PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM
issued im^V\_y* Q?J^ ^y '^*
SMITHSONIAN INSTITUTIONU. S. NATIONAL MUSEUM
Vol. 98 Washington: 1948 No. 3225
PARASITIC WASPS OF THE GENUS TRIMORUS IN NORTHAMERICA
By Robert M. Fouts
Arnold Foerster established the genus Trimorus in 1856,* indi-cating as representatives Gryon nanno Walker and Gryon phlias Wal-ker. These two species differed from other species of Gryon Walkerin having the parapsidal grooves distinct, the metanotum armed witha strong though short spine, and the abdomen elongate. Foerster,not having before him any specimens referable to Trimorus, statederroneously that the genus was characterized by having the marginalvein short and the postmarginal vein very long. According to Kieffer ^the types of nanno and phlias have the marginal vein very long andthe postmarginal vein absent. Ashmead in 1893 ^ perpetuated Foer-ster's error when he redescribed Trimorus and included his new speciesamericanus. This species has been made the type of the genus Pro-trimorus Kieffer.Ashmead's numerous species of Prosacantha * were removed fromthat genus by Kieffer in 1908,^ and, since they differed from Hoplo-gryon Ashmead only in the relative length and width of the petiole,a character of doubtful generic value, they were referred to that genus.Alan P. Dodd, in 1930,^ wrote a paper on the Australian Teleasinaein which he described many new Australian species and discussed therelationships of the genera, presenting a key to all those recognizedby him. He showed that the two genera Trimorus Foerster and Hop-
? Hymenopterologische Studien, vol. 2, pp. 101, 104, 1856.
' Ann. Soc. Sci. Bruxelles, vol. 32, p. 191, 1908.
? U. S. Nat. Mus. Bull. 45, p. 138, 1893.
* Ibid., pp. 185-198.
? Ann. Soc. Sci. Bruxelles, vol. 32, p. 200, 1908.
? Proc. Linn. Soc. New South Wales, vol. 55, pp. 41-91, 1930. 91
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logryon Ashmead, which allegedly differ only in having the parapsidalgrooves com'olote or incomplete (sometimes absent), cannot be sepa-rated. Several species are described in Mr. Dodd's paper which havethe parapsidal grooves present in the male but absent in the female.I have found that it is sometimes difficult to determine whether theparapsidal grooves are complete or even whether they are presentat all.More recently, G. E. J. Nixon, of the British Museum, has writtena paper on African Teleasinae ' in which he describes, with accom-panying keys and numerous excellent illustrations, 3 new species ofTrimorus, 24 new species of Hojdogryon, and 1 new genus (with 3 newspecies), all from South Africa, except one species from Kenya andone from Nyassaland. His new genus Macrogryon may be synony-mous with Gryonoides Dodd (1919), differing, as far as T can determinefrom the descriptions, only in the larger size of its representativesand in having the eyes pubescent.Little is known of the habits of the wasps belonging to the sub-family Teleasinae. In Europe one species of Trimorus and one ofTeleas are parasites of a species of Scolytus; one species of Trimorusand one of Teleas are guests of Lasius fuliginosus (Latreille) ; onespecies of Paragryon is a guest of Lasius flavus (Fabricius) ; and onespecies of Trimorus was reared from the gall of Rhabdophaga rosariaLoew. In the United States Trimorus bethunei (Sanders) is recordedas a guest of Formica subrufa Roger, and Trimorus caraborum (Riley)is recorded as being parasitic in the eggs of the carabid beetle Chlaeniusimpunctifrons Say.The following key may be used to separate the genera of thesubfamily Teleasinae:
1. Second abdominal segment longer than third Gryon HalidaySecond abdominal segment shorter than third 22. Scutellum armed with a spine on each side 3Scutellum unarmed 43. Eyes bare; body 2 mm. or less in length Qryonoides DoddEyes clothed sparsely with fairly long hairs; body not less than 4.8 mm. inlength Macrogryon Nixon4. Legs stout, the femora thickened 5Legs slender, the femora not thickened 65. Metanotum with one tooth or spine Teleas LatreilleMetanotum bidentate Gryonella Dodd6. Male antenna with whorls of long hairs; parapsidal grooves deep and abbre-viated Xenomerus Vv'alkerMale antennae merely pubescent; parapsidal grooves absent or delicate, notdeep 77. Metanotum unarmed Paragryon KieflferMetanotum with one tooth or spine Trimorus FocrsterMetanotum with three teeth or spines Trissacantha Ashmead
'Ann. Mag. Nat. Hist., ser. 10, vol. 17, pp. 114-191, 18 figs., 1936.
WASPS OF GENUS TKIMORUS?FOUTS 93Genus TRIMORUS Foerster ?
Trrrnorus Foerster, Hymenopterologische Studien, vol. 2, pp. 101, 104, 1856.
?
KiEFFER, Ann. Soc. Sci. Binixelles, vol. 32, p. 191, 1908; Genera insectorum,fasc. SOB, p. 98, 1910; Das Tierreich, Leif. 48, pp. 176-182, 1926.?Dodd,Proc. Linn. Soc. Nev/ South Wales, vol. .55, ])p. 41-91, 1930.
?
Nixon, Ann.Mag. Nat. Hist., ser. 10, vol. 17, pp. 116-123, 1936.Prosacantha Thomson (non Nees, 1834), Ofv. Vet.-Akad. Forh., vol. 15, pp. 421-431, 1859.?AsHMEAD, U. S. Nat. Miis. Bull. 45, pp. 185-198, 1893.?Kief-FER, Ann. Soc. Sci. Bruxelles, vol. 30, p. 162, 1906.
?
Brues, Genera insec-torum, fasc. 80, pp. 21-22, 1908; Connecticut Geol. Nat. Hist. Surv. Bull.22, p. 552, 1916.Hoplogryon Ashmead, U. S. Nat. Mus. Bull. 45, pp. 200-205, 1893.
?
Kieffer,Ann. Soc. Sci. Bruxelles, vol. 32, pp. 200-238, 1908. Brues, Genera insec-torum, fasc. 80, p. 159, 1908.
?
Kieffer, Species des hym6noptdres d'Europeet d'Algerie, vol. 11, p. 168, 1913; Das Tierreich, Lief. 48, pp. 182-234,1926.?Nixon, Ann. Mag. Nat. Hist., ser. 10, vol. 17, pp. 123-141, 161-181,1936.Pentacantha Kieffer (part), Ann. Soc. Sci. Bruxelles, vol. 32, pp. 239-250, 1908;(part) Genera insectorum, fasc. 80B, p. 93, 1910.Hemimorus Cameron, Soc. Ent., Stuttgart, Jahrg. 27, p. 77, 1912.Pro-pentacantha Kieffer (part). Das Tierreich, Lief. 48, p. 251, 1926.The more important characters of the genus are as follows: Headtransverse; ocelli close together, the lateral ones remote from the eyemargin; antennae 12-jointed in both sexes, in the female with a com-pact 6-jointed club, in the male filiform, the flagellar joints usuallylong; thorax stout; pronotum not or scarcely visible from above;parapsidal grooves absent, complete, or partly complete; scutellumsemicircular, unarmed; metanotum with one tooth or spine wliichmay be very short, hardly distinguishable, or long, extending wellover the petiole; propodeum short, frequently armed with a tooth atthe posterior angles; front wings often abbreviated, in one Nearcticspecies absent; marginal vein very long, much longer than the stigmalvein; radius short; postmarginal vein absent; abdomen rather short,broadly oval, narrowed at base; first segment subpetiolate, sometimeswith a slight basal prominence in the female; tliird segment thelongest; segments 4-6 short.CHARACTERS USED IN CLASSIFICATIONCharacters found in the surface sculpture of the frons, mesonotum,and the first three tergites of the abdomen have proved to be the mostuseful and reliable. A median carina usually extends from the basesof the antennae all the way to the anterior ocellus. In one speciesthis carina is entirely absent and in several others it is shortened above,not present below the ocellus. All the species known to the authorhave striations on the frons. These striae are usually short, but insome species they tend to become longer and sometimes extend the
6 Order Ilymenoptera: family Scelionidae: subfamily Teleasinae.
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entire length of tbe Irons. The upper half of the frons may be retic-ulate, punctate, striate, without sculpture, or it may be reticulateand punctate, the clearness and depth of the markings different invarious species.The mesonotum may have a fine sculpture, in which case it is usu-ally more or less distinctly scaly-reticulate, sometimes more or lesswrinkled anteriorly, or it may have a much coarser sculpture, inwhich case it is punctate or variously wrinkled, not usually distinctlyreticulate. The parapsidal grooves may be complete or nearly com-plete whether the general sm'face sculpture is fine or coarse, but theyare usually shorter in those species with fine m-esonotal sculpture.When the sculpture is strong the parapsidal grooves are often tracedonly with difficulty. It is sometimes difficult to make sure that thegroove one is trying to follow is not just one of many furrows in amuch wrinkled surface. Wrinkles posteriorly on the mesonotumappear always to run longitudinally; those situated anteriorly areapparently always directed transversely.The shape and sculpture of the first, second, and third tergitespresent many characters of value in separating species and groups ofspecies. The petiole varies, in different species, from broadly trans-verse to distinctly longer than wide (measured across base). Thedorsal surface is always traversed by longitudinal ridges separated bymore or less profound grooves. In the majority of the Nearcticspecies these ridges extend the entire length of the segment or nearlyso. Several species, however, have the ridges very short, presentonly across the middle. In the female the petiole may be protuberantanteriorly, the longitudinal ridges not present on the swoUen portion.A trough-shaped depression sometimes crosses the petiole, the ridgestraversing it. In several species the anterior margin is narrowlyreflexed.The second tergite is always, as far as the author knows, wider(measured across base) than long, but the proportions are somewhatdifferent in the various species. Like the petiole this segment istraversed by longitudinal ridges, or by deep grooves with the upperedges of the intervening ridges on a level with the general surface.Usually the ridges are longest medially, becoming progressivelyshorter as they approach the lateral margins. A few species have aUthe ridges equally long, their termini forming a straight line parallelwith the posterior margin. In some species with shorter lateral ridgesthe second tergite is reticulate toward the sides.Unlike the petiole and the second tergite the third tergite has noset form of sculpture. The surface may be partly or entirely striate,partly or entirely reticulate with the enclosed areas varying in sizeand the impressions varying in depth, or punctate, the pits varying in
WASPS OF GENUS TRIMORUS?FOUTS 95
size, depth, and number, or without sculpture of any kind, the surfacesmooth and pohshed. Punctures may accompany striation or reticu-lation or they may be the only type of sculpture present. Whateverthe kind or kinds of sculpture present the lateral margins are usuallybroadly and the posterior margin narrowly smooth and polished,without sculpture. Pubescence may be evenly distributed over thesurface of the segment or may be sparser medially. In a number ofinstances pubescence is entirely lacking medially.There are, of course, a number of other characters more or less ofvalue in classifying the species of this genus. The comparative andactual length of the front wing, the comparative lengths and widthsof the head, thorax, abdomen, and antennal joints, and the colors ofthe body and appendages are all characters of importance in certaininstances.
Figure 13.?Structure of Trimorus: Female of Trimorus r.igrtcoxa, new species. Drawn byOscar Whittaker.
96 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98GEOGRAPHICAL DISTRIBUTION OF THE SPECIES NUMBEROFREGION SPECIlfiSNearctic 92New York 11Pennsylvania 4District of Columbia 17Maryland 16Virginia 10Carolina 1Florida ~ 7Iowa 1Kansas 1Illinois 1Texas 4Nevada .- ? 1Utah 2Oregon 1California 2Ontario 6British Columbia 22Neotropical 6St. Vincent SGrenada 1Cuba - 1Brazil 1Palearctic 99Europe 98Madeira Islands 1Ethiopian 28British East Africa 2South Africa 26Oriental 10Java 3Philippine Islands 7Australasian 43Australia 42Tasmania 1Total numbeh of species 278As indicated in the foregoing tabulation, representatives of the genusTrimorus have been found in all the primary zoogeographical regions.Few species have been described from the Neotropical and OrientalRegions. This paucity of described species is no indication that thegenus is poorly represented but rather that little collecting has beendone. It is probable that many undescribed species occur in theseregions.It may be observed that the total for the figures in the right handcolumn is somewhat greater than that for the figures on the left. Thisis so because some species have been recorded from more than one ofthe areas listed. A few species occur in widely separated areas in NorthAmerica. T. brevicarinatus, for instance, is known to occur in
WASPS OF GENUS TRIMORUS?FOUTS 97
Maryland, District of Columbia, and Texas. T. melanopus, origi-nally described from Ontario, has recently been collected in BritishColumbia. No species, so far as known, occ\u"s in any two of the sixprimary zoogeographical regions.Alan P. Dodd, Oscar ^Vhittaker, and G. E. J. NLxon have contributedgreatly to om- knowledge of the species of Australia, of BritishColumbia, and of South Africa. All the 43 Australasian species ofTrimorus have been described by Mr. Dodd. All the 22 new speciesfrom British Columbia are described from material collected by Mr.Whittaker. His generosity in sending this material to the author forstudy has made possible a substantial increase in our knowledge ofNearctic species. All but one of the 28 Ethiopian species weredescribed by Mr. NLxon.The key presented herewith is a development and expansion of apreliminary one prepared by the author in 1926. This included allAshmead's species of Hoplogryon, some of Ashmead's species of Prosa-cantha, Gahan's Hoplogryon kansasensis, and undescribed species inthe author's collection. Several of Ashmead's species of Prosacantha,
e. g., californica, gracilicornis, linellii, macrocera,minutissima,schwarzii,and xanthognatka and all species described by Kieffer, Brues, andSanders, were not included in the original key and are now placed, ortheir approximate positions indicated, solely on the basis of the lit-erature concerning them. Notes made by the author on the type mate-
rial indicate that Prosacantha americana Ashmead and Hoplogryonobscuripes Ashmead should be transferred to the genera Teleas Latreilleand Paragryon Kieffer, respectively.KEY TO NEARCTIC SPECIES OF TRIMORUS
1. Wings absent or abbreviated 2Wings normally developed 172. Wings absent (1) apterus, new speciesWings abbreviated 33. Wings extending to or past apex of petiole 4Wings not extending past apex of propodeum 84. Petiole black, elevated anteriorly; third tergite strongly reticulate.(2) utahensis (Ashmead)Petiole black or reddish, not elevated anteriorly 55. Body and antennae entirely black; third tergite smooth, without sculpture.(3) formosus, new speciesPetiole reddish; third tergite reticulate, if punctate then with striaebasally 66. Thorax mostly reddish; proximal four antennal joints and legs yellow 7Thorax black or very dark brown; antennae black or dark brown, scape brown-ish basally; legs yellow to light brown (4) bruesi (Kieffer)7. Wings extending to apex of petiole, ciliated; mesonotum strongly punctate,punctures almost confluent; third tergite smooth, with a few scatteredpunctures; mandibles with two long, equal teeth (5) grandis (Brues)783388?48 2
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Wings extending to about middle of second tergite, not ciliated; mesonotumnot so strongly punctate, punctures for most part clearly separated;third tergite irregularly striate toward base, with sparse scattered punc-tures; left mandible with three teeth (6) pulchricomis, new species8. Third tergite closely punctate, not reticulate (7) crassellus, new nameThird tergite not closely punctate, distinctly reticulate 99. Legs, reddish yellow (8) solitarius (Aslunead)Legs mostly darker 1010. Frons just below anterior ocellus not or very delicately sculptured 11Frons just below anterior ocellus strongly sculptured 1211. Frons with a very fine impressed line from antennae to anterior ocellus, with-out striae around base of this impressed line; third tergite 1.4 times aswide as long (9) nitidus, new speciesFrons with a distinct impressed median line, striate just above antennae;third tergite 1.5 times as wide as long (10) esilis, new species12. Frons strongly convex; head about one and one-fourth times as wide as long.(11) crassiceps, new speciesFrons not strongly convex; head about twice as wide as long 1313. Petiole with a trough-shaped depression across middle 14Petiole not depressed across middle 1514. Third tergite faintly reticulate; posterior tibiae reddish brown.(12) punctithorax, new speciesThird tergite with impressed reticulation; posterior tibiae dark brown,reddish yellow basally (13) subapterus, new species15. Legs brownish; coxae brown (14) rufosignatus (Kieffer)Coxae, femora, and tibiae (except the latter proximally) black or very darkbrown 1616. Body 1.42 mm. in length (15) robustus, new speciesSmaller, body 1.18 mm. in length (16) finitimus, new species17. Parapsidal grooves more or less well defined, complete or nearly so 18Mesonotum variously sculptured, parapsidal grooves sometimes partly indi-cated, never complete and always more or less obscured by sculpture. 3118. Mesonotum punctate, striate posteriorly 19Mesonotum maj' be either partly punctate or partly striate but not both. 2019. Mesonotum rugose anteriorly; scutellum smooth, slightly roughened atanterior margin; parapsidal grooves distinct entire length of mesono-tum (17) pallidipes (Ashmead)Mesonotum not rugose anteriorly; scutellum strongly reticulate, high ridgesseparating enclosed areas; parapsidal grooves perceptible but not sharplydefined, difficult to detect posteriorly in coarse sculpture.(18) striopunctatus, new species20. Third tergite with sculpture 21Third tergite without sculpture 2621. Third tergite punctate, not striate toward base.(19) erythrogaster, new speciesThird tergite striate toward base 2222. Mesonotum longitudinally striate posteriorly (20) sulcatus (Kieffer)Mesonotum not striate 2323. Scape entirely light yellowish brown (21) erythropus (Ashmead)Scape black entirely or in part 2424. Scape yellow basally; legs yellow or light brown. _ (22) crosbyi, new speciesScape entirely black; legs mostly dark brown 25
WASPS OF GENUS TRIMORUS?FOUTS 99
25. No median carina on upper half of frons; ridges on second tergite nearlyreaching apex of segment (23) distinctus, new speciesA sharp median carina to anterior ocellus; ridges medialh' on second tergitenut extending past basal two-thirds (24) percurrens, new species26. Petiole black or faintly reddish brown; coxae black or dark brown 27Petiole and base of second tergite reddish yellow; coxae Ught yellowishbrown (25) minutus, new species27. Parapsidal grooves not present anteriorly (26) tenuicornis (Kieffer)Parapsidal grooves complete 2828. Frons with a few short striae immediately below anterior ocellus; wingsbrownish; species larger, about 1.7 mm. in length 29Frons without striae below anterior ocellus; wings hyaline; species smaller,about 1.0 mm. in length 3029. Mesonotum not roughened (except posteriorly where it is irregularly striate),reticulate, the areas very minute; scutellum smooth, with a few scatteredpunctures, with only a few fine scattered hairs. (27) lionotus, new speciesMesonotum roughened, scaly-punctate, not irregularly striate posteriorly;scutellum rather thickly pubescent, scaly-punctate anteriorly.(28) pictus, new species30. Mesonotum with a very fine scaly-reticulate sculpture; second tergite withridges medially on basal two-thirds (29) improcerus, new speciesMesonotum with similar but stronger sculpture; second tergite with ridgesmedially on basal four-fifths (30) notabilis, new species31. Third tergite striate or with lovv' ridges, at least in part 32Third tergite not striate and without low ridges 5032. Petiole and thorax (in part) reddish (31) varius, new speciesThorax black or dark brown (dark reddish brown laterally, black above inflavicoxa) 3333. Posterior coxae light in color 34Posterior coxae black or mostly black 4534. Striae usually strong, extending past middle of third tergite 35Striae not extending past middle of third tergite, or striae few, and, thoughextending past middle, very fine and interrupted 4035. Third tergite with numerous large punctures- (32) marylandicus (Ashmead)Third tergite not punctate or with only a few small punctures laterally? 3636. Frons with a strong median carina; upper frons striate 37Frons without a median carina or with a short low carina below 3837. Scape brownish basally; striae on frons interrupted medially on each side ofmedian carina; striae in middle of third tergite shorter, scarcely extendingpast middle (33) striatifrons (Ashmead)Scape black; striae on frons not interrupted medially; all striae on thirdtergite of equal length, nearly attaining apex of segment.(34) rubripes, new species, rufocoxalis, new variety38. Frons punctate above; mesonotum posteriorly punctate; metanotal spinelong and sharp; lateral angles of propodeum prominent, acute; striae outhird tergite strong and regular, especially medially; petiole black.(35) kansasensis (Gahan)Frons without distinct sculpture above; mesonotum posteriorly not punctate;metanotal spine short, inconspicuous; striae on third tergite not so strong,more or less irregular and confluent 3939. Mesonotum posteriorly longitudinally striate; petiole yellowish brown,lighter in color than rest of abdomen (36) striativentris (Ashmead)Mesonotum reticulate; abdomen mostly reddish brown.(37) repentinus, new species
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40. Legs mostly dark brown (38) brunneipes, new speciesLegs mostly lighter in color 4141. Mesonotum anteriorly finely punctate 42Mesonotum anteriorly coarsely punctate 4342. Petiole elevated anteriorly (39) pusillus (Ashmead)Petiole not elevated anteriorly (40) columbianus (Ashmead)43. Scape and pedicel light reddish brown (41) flavicoxa (Ashmead)Scape not entirely light reddish brown 4444. Frons not striate except shortly below and narrowly laterally.(42) xanthopus, new speciesFrons entirely strongly striate (43) fuscipennis (Ashmead)45. Third tergite not distinctly punctate 46Third tergite punctate 4746. Third sternite strongly striate 48Third sternite not striate; mesonotum coarsely and thickly punctate.(44) nigripes (Ashmead)47. Third antennal joint about twice as long as thick.(45) jucundus, new speciesThird antennal joint about four and one-half times as long as thick.(46) caraborum (Riley)48. Frons entirely strongly carinate.(34) rubripes, new species, rubripes, new varietyFrons with at least a median area that is not carinate 4949. Frons above with strong beadlike sculpture; striae on third tergite few andextending only slightly past middle (47) leonardi, new speciesFrons without beadlike sculpture; striae on third tergite numerous andnearly attaining apex (48) punctiventris (Ashmead)50. Thorax reddish laterally and partly reddish above 51Thorax black above at least 5251. Antennal joints 3, 4, and 5 reddish brown (49) annulicornis (Ashmead)Antennal joints 3, 4, and 5 black (50) pleuralis (Ashmead)52. Petiole reddish or yellowish, lighter than rest of abdomen 53Petiole not decidedly lighter than rest of abdomen 5653. Third tergite reticulate 54Third tergite closely punctate _ (51) sculpturatus, new species54. Only basal half of second tergite with grooves (52) petiolatus, new speciesGrooves nearly attaining apex of second tergite 5555. Mesonotum thickly punctate, subopaque; petiole red; legs reddish brown,the coxae dark brown; petiole about one and one-third times as wide aslong (53) rufocinctus, new seriesMesonotum with a moderately fine sculpture, reticulate-punctate; petioleyellowish, about one and one-half times as wide as long; legs, includingcoxae, light brown (54) flavocinctus, new species56. Third tergite without sculpture or very faintly reticulate (pennsylvanica) oraciculate 57Third tergite distinctly reticulate 65Third tergite punctate (55) xanthognathus (Ashmead)57. Third tergite without sculpture or with a few fine punctures laterally? 58Third tergite faintly reticulate or aciculate 6158. Upper part of frons smooth, without sculpture 59Upper part of frons with sculpture (56) clarus, new species59. Second tergite with carinae or ridges at base only.(57) califomicus (Ashmead)Ridges on second tergite extending at least to apical fourth 60
WASPS OF GENUS TRIMORUS?FOUTS 101
60. Parapsidal grooves briefly indicated posteriorly; wings not quite reaching tipof abdomen (58) silvaticus, new speciesParapsidal grooves absent; wings extending past apex of abdomen.(59) crassicornis (Kieffer)61. Posterior coxae entirely yellowish brown 62Posterior coxae mostly darker 6462. Abdomen longer than the head and thorax combined.(60) virginiensis (KieflFer)Abdomen about as long as the head and thorax combined 6363. Mesonotum subopaque, slightly roughened; wings hyaline.(61) claripennis (Ashmead)Mesonotum obscurely delicately sculptured; wings brownish.(62) concinnus, new name64. Metanotal spine nearly as long as petiole . . (63) pennsylvanicus (Ashmead)Metanotal spine less than half as long as petiole.(64) brevicarinatus, new species65. Mesonotum with large scattered punctures anteriorly,(65) pmictiger, new speciesMesonotum without large scattered punctures 6666. Mesonotum with sculpture rather strong 67Mesonotum with fine sculpture 7367. Frons above punctate, not reticulate (66) nanus (Ashmead)Frons above not or extremely finely punctate 6868. Frons above reticulate 69Frons above without distinct sculpture or with a few extremely smallscattered punctures 7269. Frons above with very close impressed reticulation, granular in appear-ance 70Frons not granular in appearance 7170. Scape dark reddish brown; femora and tibiae light brownish.(67) longipennis (Ashmead)Scape piceous; femora and tibiae very dark brown.(68) nigricoxa, new species71. The very close and fine reticulation on third tergite somewhat obscured byevenly distributed pubescence (69) whittakeri, new speciesThird tergite without pubescence medially on anterior half.(70) obscurus. new soecies72. Legs, including coxae, mostly light brown (71) bilineatus (Aslmaead)Legs, including coxae, mostly black (72) pulchellus, new species73. Grooves on petiole not extending to anterior margin of segment 74Grooves on petiole extending to anterior margin 7774. Legs, except trochanters, dark brown 75Legs, except coxae and most of tibiae, light brownish or reddish brown __ 7675. Body black, a little over 1 mm. in length (73) vinctus, new nameBody somewhat lighter in color, a rather dark reddish brown; length about0.9 mm (74) monticola, new species76. Petiole elevated anteriorly; posterior tibiae fuscous- (75) texanus, new speciesPetiole not elevated anteriorly; posterior tibiae brown. (76) minor, new species77. Frons reticulate over most of its surface 78Frons not reticulate over most of its surface 7978. Mesonotum distinctly reticulate (77) melanopus (Ashmead)Mesonotum indistinctly reticulate (78) reticulatus, new species79. Petiole longer than wide 80Petiole much wider than long, not elevated anteriorly 81
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80. Frons smooth, polished, with short striae below; petiole elevated slightlyanteriorly (79) fumipennis (Ashmead)
"Face and cheeks strongly striated". (80) schwarzii (Ashmead)81. Grooves medially on second tergite widening posteriorly (81) nigrobrvinneus,new species.Grooves medially on second tergite becoming narrower posteriorly, the inter-vals flat, becoming wider behind where they merge into flat polished borderof segment 8282. Third tergite very finely reticulate (82) perspicuus, new speciesThird tergite more strongly reticulate, lines more deeply imipressed 8383. Vertex, and frons just in front of median ocellus, reticulate with distinctpunctures (83) amabilis, new speciesVertex and frons without distinct sculpture (84) lepidus, new species
(1) TRIMORUS APTERUS, new speciesFemale.?Length 0.82 mm. Head about twice as wide as long,about one and one-seventh times as wide as the thorax; occiput, ver-tex, and mesonotum with dense impressed reticulation; upper half offrons pubescent and finely reticulate; below on the sides the frons isstriate; just above these striae on each side is a small reticulate area;median carina very fine, apparently not quite attaining the anteriorocellus; frons except as noted above smooth, without sculpture;scutellum smooth, reticulate anteriorly; parapsidal grooves very short;spine on metanotum short, a mere tubercle, acute at apex; thoraxabout as wide as long; lateral angles of propodeum scarcely project-ing; wings wanting; abdomen not quite one and two-thirds times aslong as wide, 2.2 times as long as the thorax, 1.3 times as wide as thethorax; petiole about twice as wide as long, with 9 or 10 grooves ex-tending its entire length; second tergite twice as wide as long, twiceas long as the petiole, with numerous small ridges extending to apicalfifth, the grooves between the ridges are deep anteriorly but shallowand with flat bottoms posteriorly; third tergite one and one-thirdtimes as wide as long, 2.6 times as long as the second, pubescent,sparsely so medially, and with faint reticulation anteriorly, apparentlywithout sculpture posteriorly; dark brown; legs yellowish brown, thefemora and tibiae in part somewhat darker.Type locality.?Washington, D. C.One specimen collected May 20, 1915, by the author.r^/i?^.?U.S.N.M. No. 57773.
(2) TRIMORUS UTAHENSIS (Ashmead)
Prosacantha vlahensis Ashmead, U. S. Nat. Mus. Bull. 45, p. 189, 1893 (female).?Brues, Genera insectorum, fasc. 80, p. 23, 1908.Hoplogryon utahensis, Kieffer, Genera insectorum, fasc. SOB, p. 96, 1910; DasTierreich, vol. 48, p. 229, 1926.Type locality.?Park City, Utah.Type.?v.S.N.M. No. 24498.
WASPS OF GENUS TRIM0RU3?FOUTS 103
(3) TRIMORUS FOKMOSUS. new speciesFemale.?Length 1.27 mm. Head about twice as wide as long,nearly 1.3 times as wide as the thorax, not quite so wide as the ab-domen; occiput with dense impressed reticulation; vertex finely retic-ulate ; frons without sculpture except some indistinct markings above,v/ith a fine suture from antennae to anterior ocellus; mesonotum,scutellum laterally, second tergite laterally, third tergite laterally andposteriorly, and following tergites with short white pubescence; meso-notum roughly scaly reticulate; parapsidal grooves present on poste-rior half of mesonotum; scutellum smooth, somewhat roughened an-teriorly; spine on metanotum rather short, acute; abdomen 1.7 timesas long as wide, 1.9 times as long as the thorax; petiole slightly widerthan long, with 8 or 9 longitudinal grooves extending its entire length(except for the very narrow anterior and posterior margins); secondtergite 1.4 times as wide as long, one and one-thu*d times as long asthe petiole, with 9 or 10 deep grooves separated by narrow ridges toposterior third; third tergite 1.2 times as wide as long, 2.6 times aslong as the second, smooth, without sculpture, anterior wdngs extend-ing nearl}^ to the middle of the third tergite, about four times as longas wide; black; legs brown, the front and middle tibiae darker in part.Type locality.?Chilliwack, British Columbia.T?/;)e.?U.S.N.M. No. 57774.One specimen collected June 5, 1927, by Oscar Whittaker.
(4) TRIMORUS BRUESI (Kieffer)Prosacantha brachyptera Ashmead, Can. Ent., vol. 20, p. 50, 1888 (female).Hoplogryon bachypterus, Ashmead, U. S. Nat. Mus. Bull. 45, p. 204, 1893 (female).
?
Harrington, Trans. Roy. Soc. Canada, ser. 2, sect. 4, p. 185, 1899 (male).?Brues, Genera insectorum, fasc. 80, p. 25, 1908.
?
Fouts, Cornell. Univ.Mem. 101, p. 964, 1928.Hoplogryon bruesi Kieffer, General insectorum, fasc. SOB, p. 96, 1910.Hoplogryon dolichopterus Kieffer, Das Tierreich, Lief. 48, p. 216, 1926 (male,female).Female.?Length 0.95 mm. Head not quite twice as wide as long,a little wider than the thorax, somewhat narrower than the abdomen;frons with a fine median carina to anterior ocellus, with short striaeand reticulation below on the sides, laterally and above smooth, indis-tinctly punctulate; occiput with dense impressed reticulation; cheeksindistinctly aciculate ; thorax as wide as long, convex dorsally ; mesono-tum scaly-reticulate, rather strongly but shortly longitudinallywrinkled posteriorly, with the parapsidal furrows present as broaddepressions on posterior half; scutellum convex, reticulate on anteriorhalf, polished posteriorly; metanotal spine triangular, acute at apex,less than half as long as the scutellum ; anterior wings about four timesas long as wide, with short cilia along margins, extending about to theapex of the third tergite; abdomen 1.3 times as long as wide, convex
104 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m
(lorsally; petiole about twice as wide as long, with a number of longi-tudinal gi'ooves its entire length, v> ith a slight transverse depressionacross middle; second tergite one and one-half times as long as thepetiole, about 1.8 times as wide as long, with a number of parallel orslightly diverging ridges to posterior third, these ridges subequal inlength except near the lateral margins of the segment where they aremuch shorter; third tergite 2.6 times as long as the second, 1.5 timesas wide as long, faintly reticulate, sparsely pubescent laterally andalong the posterior margin; body dark brown; antennae dark brown,the scape lighter basally; mandibles yellow, the teeth reddish; legsyellow, the femora, tibiae, and tarsi, in part, somewhat darker;wings tinged with brown.Variations.?Body sometimes black; legs sometimes mostly brown-ish, but not darkly so; mesonotum in some specimens with the sculp-ture more delicate, without wrinkles posteriorly, with the parapsidalfurrows shorter and shallower; metanotal spine sometimes half as longas the scutellum and sometimes very short, a mere tubercle; in severalspecimens the ridges on the second tergite are only half as long as thesegment and the intervening grooves are deeper; the anterior wingsmay extend to the apex of the thu'd tergite or scarcely extend pastits base.TyjJe locality.?Ottawa, Canada.Ty^e.?U.S.N.M. No. 2244.The description and notes on variation given above are based on anumber of specimens in the author's collection procured from thefollowing localities: Ottawa, Canada (three specimens); McLean,N. Y. (two specimens collected June 21, 1924, from spider materialby sifting); McLean Bogs, N. Y. (tliree specimens. May 16, 1925);Cinnamon Lake, Schuyler County, N. Y. (two specimens, June 5,1925) ; Nigger Pond, Oswego County, N. Y. (one specimen, September3, 1926); Ithaca, N. Y. (one specimen. May 1924); WoodwardiaSwamp in Freeville, N. Y. (one specimen, July 28, 1929); and twospecimens labeled Wachocastinook Creek, Salisbury, Conn., June 29,1930. All this New York material was sent to me for identificationby Profs. C. R. Crosby and M. D. Leonard, of Cornell University.
(5) TRIMORUS GRANDIS (Brues)Hoplognjon grandis Brues, Bull. Wisconsin Soc. Nat. Hist., ser. 2, vol. 5, p. 102,1907.?KiEFFER, Das Tierreich, Lief. 48, p. 218, 1926.?Fouts, CornellUniv. Mem. 101, p. 964, 1928.Tyjie locality.?Long Island, N. Y.Type.?V.S.N.M. No. 42705.
(6) TRIMORUS PULCHRICORNIS. new speciesFemale.?Length 1.9 mm. Head twice as wide as long, one andone-third times as wide as the thorax, as wide as the abdomen; frons
WASPS OF GENUS TRIMORUS?FOUTS 105
with a median longitudinal carina, stronger below, extending to theanterior ocellus; below and laterally to the summit of the eye thefrons is strongly carinate; upper part of frons smooth, with largepunctures, these punctures several tunes their diameter distant fromone another; below this punctate area the frons is smooth, and,except for the median carina, without scidpture; vertex separated fromthe occiput by a subacute ridge; occiput striatopimctate ; mesonotumand scutellum umbilicately punctate, the punctures much shallowerthan wide; posteriorly on the mesonotum the punctures are larger,irregular, and more or less confluent; parapsidal grooves not present;spine of metanotum long, acute, reaching above the middle of thepetiole; wings narrow, extending about to the middle of the secondtergite, not ciliate; abdomen very little longer than the head andthorax combined, 1.2 times as long as wide, ovate; petiole about oneand one-half times as wide as long, with a number of longitudinalgrooves separated by low rounded ridges; second tergite likewise withgrooves but they are wide and shallow^, slightly wider apically thanbasally, the intervening ridges extending to apical fourth ; third tergiteabout one and two-thhds times as wide as long, three times as long asthe second, striatopunctate on basal three-fourths except mediallywhere it is smooth; striae on third tergite irregular, ^\avy, becomingfiner posteriorly; laterally and on a median longitudinal area the thirdtergite is smooth, punctate but not striate; punctures scattered, largeanteriorly on the third tergite, becoming much smaller posteriorly,scattered all over the surface except on a narrow band posteriorly;black; proximal five antennal joints light brownish yellow; legs yellow,the posterior tibiae and tarsi light brownish; thorax reddish brown,the scutellum and a large median spot on the mesonotum black;petiole reddish brown.Type locality.?Glen Echo, Md.Type.?V.S.N.M. No. 57775.One specimen collected by the author.This pretty species is apparently closely allied to grandis Brues.Its distinctive color pattern enables it to be readily separated from
all our described species.
(7) TRIMORUS CRASSELLU9, new nameGryon columbianus Ashmead, U. S. Nat. i\liis. Bull. 45, p. 208, 1893 (female).?
-
Brues, Genera insectorum, fasc. 80, p. 25, 1908.Paragryon columbianus, Kieffer, Genera insectorum, fasc. SOB, p. 99, 1910.?
?
Brues, Connecticut Geol. Nat. Hist. Surv. Bull. 22, p. 554, 1916.
?
Kieffer,Das Tierreich, Lief. 48, p. 237, 1926 (female).The name columbianus is precoccupied in Trimorus by columbianusAshmead (described in Prosacantha in 1893).783388?48 3
106 PROCEEDINGS OF THE NATIONAL MUSEUM vol.08
Female.?Length 1.36 mm. Head 1.8 times as wide as long, 1.1times as wide as the thorax; frons striate below middle of eye exceptfor a small area on each side of the median carina, which is polished;median carina present on lower half of frons, replaced by a narrowgroove to anterior ocellus; frons above striae reticulate with smalldense punctures; vertex densely punctulate; occiput impressed-reticulate; thorax about as wide as long, subconvex above; mesono-tum uniformly densely punctulate, with parapsidal grooves on pos-terior half; scuteUum densely punctulate; metanotal spine short,acute; lateral angles of propodeum rather prominent, acute; wingsnot reaching apex of propodeum; abdomen 1.5 times as long as wide,1.1 times as wide as the head, strongly convex dorsally; petiole about1.6 times as wide as long, with ridges to anterior margin, with atrough-shaped depression across middle; second tergite about 2.2times as wide as long, 1.45 times as long as the petiole, with a fewwidety spaced grooves on anterior half, all the area between thesegrooves and posterior to them except a narrow marginal rim rugose;third tergite 1.4 times as wide as long, 2.5 times as long as the second,uniformly closely punctulate; black; antennae piceous, the scape andpedicel reddish brown ; coxae dark brown ; legs yellow.Type locality.?District of Columbia.TV^e.?U.S.N.M. No. 2246.Redescribed from one specimen in the author's collection labeled:Washington, D. C, April 28. It was compared with the type ofGrijon columbianus in 1926.
(8) TRIMORUS SOLITARIUS (Ashmead)Hyplogyron soUtarius Ashmead, U. S. Nat. Mus. Bull. 45, p. 205, 1893.
?
Kieffer,Das Tierreich, Lief. 48, p. 215, 1926.Type locality.?Ottawa, Canada.TVpe.?U.S.N.M. No. 24527.
(9) TRIMORUS NITIDUS. new speciesFemale.?Length 1.09 mm. Very closely allied to exilis from whichit differs as follows: Head 1.8 times as wide as long, 1.2 times as wideas the thorax, strongly convex in front; a very delicate carina tomiddle of frons ; no striae medially below on the frons ; no reticulationalong inner eye margin; upper third of frons with some very fine,indistinct punctures; pubescence more sparse generally, apparentlynot present on mesonotum and scutellum; second tergite 1.7 timesAS long as the petiole; third tergite 1.4 times as wide as long, 2.5times as long as the second.Type locality.?Hollyburn, British Columbia (September 3, 1929).Type.?U.S.^.yi. No. 57776.Paratype locality.?Galiano Island, British Columbia (August 1,1929).
WASPS OF GENUS TRIMORUS?FOUTS 107Two specimens collected by Oscar Wliittaker.In the paratype the pubescence is absent medially on the thirdtergite. Paratype in Whitaker's collection.
(10) TRIMORUS EXILIS, new speciesFemale.?Length 1.27 mm. Head about twice as wide as long,1.15 times as wide as the thorax, indistinctly narrower than theabdomen; frons with a delicate impressed median line to upper third,with short striae below, with an impressed-reticulate area laterallyjust above the striae, narrowly reticulate along inner eye margin,finely reticulate on upper third, the impressions less distinct medially;thorax as wide as long, convex above; mesonotum scaly reticulate,the sculpture moderately strong; parapsidal grooves distinct onposterior third; scutellum convex, reticulate, more strongly so an-teriorly; mesonotum and scutellum evenly pubescent; propodeumarcuately emarginate posteriorly, the lateral angles sharp; metanotalspine triangular, rather broad basally, acute apically, about half aslong as the scutellum; abdomen broadly elliptical, 1.5 times as longas wide, 1 .8 times as long as the thorax ; petiole twice as wide as long,with numerous narrov/ deep grooves to anterior margin, the anteriormargin narrowly reflexed ; second tergite about twice as wide as long,about twice as long as the petiole, with ridges medially to posteriorfourth, the ridges becoming progressively shorter laterally, reticulatebehind these shorter ridges; third tergite 1.5 times as wide as long,2.2 times as long as the second, pubescent all over but more sparselyso medially, evenly reticulate, the impressions finer along the lateralmargins, with the posterior margin narrowly smooth, without sculp-ture; wings narrow, not quite attaining the apex of the propodeum;black; legs very dark brown, the trochanters, tibiae proximally anddistally, and metatarsi basally, reddish brown.Type locality.?Chilliwack, British Columbia.2V^e.?U.S.N.M. No. 57777.One specimen collected September 9, 1927, by Oscar Whittaker.(U) TRIMORUS CRASSICEPS. new speciesFemale.?Length 0.97 mm. Head about one and one-fourth timesas wide as long, 1.2 times as wide as the thorax; frons strongly convex,with impressed reticulation and pubescent except medially below, witha median carina to anterior ocellus, this carina not distinct exceptbelow where the surface is smooth; vertex and occiput impressed-reticulate like the frons; thorax about as wide as long, somewhatflattened above; parapsidal grooves nearly reaching anterior marginof mesonotum, sharply indicated; mesonotum scaly-reticulate, thesculpture moderately strong; scutellum with dense impressed reticu-lation, the areas small; metanotal spine very short, blunt apically,a,bout a third the length of the scutellum; wings short, narrow, ex-
108 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98
tending to apex of propodcum; abdomen 1.45 times as long as wide,slightly wider than the head, strongly convex dorsally; petiole abouttwice as wide as long, with numerous longitudinal ridges, with atrough-shaped depression across middle; second tergite about twiceas wide as long, 1.6 times as long as the petiole, with many parallelor diverging longitudinal ridges which extend medially about toapical fourth; laterally the ridges are shorter; thu-d tergite 1.3 timesas wide as long, uniforndy reticulate except narrowly laterally andposteriorly; black; scape dark brown, slightly paler proximad; flagel-lum piceous; legs reddish brown, the coxae, femora, and tibiae brown;posterior tibiae reddish brown; tarsi yellowish, the last joint ofeach brown.Type locality.?Hollyburn, British Columbia.r^/pe.?U.S.N.M. No. 57778.One specimen collected June 3, 1930, by Oscar Whittaker.
(12) TRIMORUS PUNCTITHORAX, new speciesFemale.?Length 1.5 mm. Head about twice as wide as long, alittle wider than the thorax; frons laterally and above reticulate withfine striae and numerous minute punctures ; frons with a carina to theanterior ocellus, medially polished, with a few wavy aciculae; exceptfor this median smooth area the frons is closely and evenly pubescent;vertex and occiput with dense impressed reticulation; thorax about aswide as long; mesonotum very densely and finely punctate, closely andevenly pubescent; parapsidal grooves briefly indicated posteriorly;scutellum with close impressed reticulation, pubescent over its entiresurface; metanotal spine short, acute, not reaching past the apex of themetanotum; wings narrow, not quite reaching to the apex of the pro-podeum; abdomen about one and two-thirds times as long as wide,about one and one-fourth times as long as the head and thorax com-bined, about one and one-tenth times as wide as the head; petioleabout one and one-half times as wide as long, with eight of nine longi-tudinal grooves, slightly depressed across the middle; second tergite1.6 times as wide as long, one and one-half times as long as the petiole,with ridges and grooves reaching apical one-fourth ; the grooves widenapically and those toward the middle of the segment have each a smalllongitudinal ridge medially at the apex ; posterior fourth of the secondtergite smooth, without sculpture; following segments evenly andmoderately thickly pubescent; third tergite 1.4 times as wide as long,2.4 times as long as the second, entirely finely reticulate except narrowlyalong the posterior margin; black; legs dark brown, the knees, tibiaeapically, posterior tibiae entirely, and each metatarsus yellowish brownto rather dark reddish brown; coxae black.Type locality.?ChilliAvack, British Columbia.TV^e.?U.S.N.Al. No. 57779.One specimen collected September 18, 1926, by Oscar Whittaker.
WASPS OF GENUS TRIMORUS?FOUTS 109
(13) TRIMORUS SUBAPTERUS. new speciesFemale.?Length 1.53 mm. Head about twice as wide as long, 1.1times as wide as the thorax; occiput, vertex, frons above and on thesides, mesonotum, and scutellum with a strong granular sculpture;frons medially below smooth, with a carina extending to median ocellus;thorax 1.1 times as long as wide; parapsidal grooves short; spine onmetanotum short, acute; wings attaining apex of metanotum, verynarrow, the venation not discernible ; lateral angles of propodeum pro-jecting, blunt apically; abdomen 1.4 times as long as wide, 1.1 timesas w^ide as the head; petiole 1.5 times as wide as long, with five deepgrooves above and a much broader groove on each side ; these groovesextend from the anterior margin nearly to the posterior margin, with atrough-shaped depression across middle; second tergite 1.7 times aswide as long, 1.3 times as long as the petiole, with about 10 strongdiverging longitudinal ridges to apical fourth; third tergite 1.4 timesas wide as long, 2.7 times as long as the second, evenly covered withdecumbent white hairs, uniformly, except along the lateral and pos-terior margins, with dense impressed reticulation; black; extreme apicesof femora, tibiae basally (proximal one-third of hind tibiae) and meta-tarsus of each leg, reddish yellow; tarsi, except as noted above, brown.Type locality.?Chilliwack, British Columbia.r?/2?e.?U.S.N.M. No. 57780.Tliree specimens collected September 6 and 11, 1926, by OscarWhittaker.Paratype in Whittaker collection.
(14) TRIMORUS RUFOSIGNATUS (Kiefier)Hoplogryon rvfipes Ashmead {non Thomson, 1859), U. S. Nat. Mus. Bull. 45, p.205, 1893 (female).
?
Brues, Genera insectorum, fasc. 80, p. 25, 1908.
?
FotTTS, Cornell Univ. Univ. Mem. 101, p. 964, 1928.Hoplogryon rufosignaius Kieffer, Genera insectorum, fasc. SOB, p. 97, 1910.Hoplogryon ashmeadianus Kieffer, Das Tierreich, Lief. 48, p. 215, 1926 (female).Female.?Juengih 1.14 mm. Head about twice as wide as long, 1.2times as wide as the thorax, sculptured as in crassiceps; thorax a littlewider than long, subconvex dorsally; mesonotum closely scaly-reticulate, the sculpture rough, subopaque, the surface appearingclosely punctulate; parapsidal grooves apparently nearly completebut not clearly defined except posteriorly; metanotal spine very shortas in crassiceps; abdomen 1.4 times as long as wide, strongly convexdorsally; petiole nearly twice as wide as long, with numerous longitu-dinal grooves, not elevated anteriorly and without a transverse de-pression; second tergite not quite twice as wide as long, 1.4 times aslong as the petiole, with ridges to apical fourth as in crassiceps; thirdtergite 1.4 times as wide as long, 2.9 times as long as the second, reticu-late as in crassiceps but the enclosed areas a little smaller; black; scapevery dark brown; legs brown, the femora and tibiae a little darker.
110 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ds
Type locality.?District of Columbia.Type.?U.S.^M. No. 24526.This description is based on one specimen fron McLean, N. Y. Itwas collected by Prof. C. R. Crosby, June 21, 1924, from spider mate-
rial by sifting. The author's 1928 record of the occurrence of thisspecies in New York was based on this specimen, which was comparedwith the type of Hoplogryon rufipes Ashmead.
(15) TRIMORUS ROBUSTUS, new speciesFemale.?Length 1.42 mm. Head twice as wide as long, about oneand one-sLxth times as wide as the thorax, about half as long as thethorax; occiput, vertex, and upper half of frons with dense impressedreticulation, the latter area with a number of small scattered punc-tures; median carina not evident above middle of frons; frons narrowlylaterally reticulate, with fine Avavy aciculae medially, striate below;thorax a little longer than wide; mcsonotum and scutellum scalyreticulate, evenly pubescent; parapsidal grooves absent; spine onmetanotum sharp and moderately long; wings extending to the apexof the propodeum, very narrow, the venation not discernible; lateralangles of propodeum projecting, subacute; abdomen about one andone-half times as long as wide, a little wider than the head, one andthree-fourths times as long as the thorax; petiole 1.45 times as wideas long, with about ten deep grooves extending from the anteriormargin to the posterior one-tenth, not elevated anteriorly and withouta transverse depression; second tergite 1.7 times as wide as long, 1.7times as long as the petiole, with a number of deep longitudinal grooveswhich are shorter toward the lateral margins of the segment, becominglost in a moderately strong impressed-reticulate sculpture; five of thegrooves, each of which is about twice as wide as any on the petiole,extending nearly to the apex of the tergite; third tergite 1.4 times aswide as long, 2.2 times as long as the second, smoothly reticulate,the enclosed areas fairly large, becoming considerably smaller posteri-orly; black; knees and anterior tibiae apically, yellowish brown;tarsi brownish.Type locality.?Chilliwack, British Columbia.Type.?V.S.N.U. No. 57781.Two specimens collected September 26, 1926, and September 9,1927 by Oscar Whittaker.Paratype in Wliittaker collection.
(16) TRIMORUS FINITIMUS. new speciesFemale.?Length 1.18 mm. Head twice as wide as long, a littlewider than the thorax, about as wide as the abdomen, moderately con-vex in front, scarcely excavated behind; upper frons, vertex, andocciput impressed-reticulate; a fine median carina to anterior ocellus;frons narrowly laterally reticulate, below smooth, without sculptiu-e;
WASPS OF GENUS TRIMORUS?FOUTS 111
thorax 1.2 times as wide as long, strongly convex above; parapsidalgrooves on posterior half of mesonotum; mesonotiim with fine scalyreticulation, thickly pubescent, shining; scuteilum smooth, withindistinct sculpture, pubescent; metanotal spine about half as longas the scuteilum, triangular seen from above, acute apically; abdomen1.4 times as long as wide, ovate, rounded posteriorly; petiole 1.7times as wide as long, with numerous longitudinal ridges extendingits entire length, with a narrow depressed rim along the anteriormargin, without a depression across the middle; second tergite twiceas wide as long, 1.6 times as long as the petiole, with a few parallel orslightly diverging ridges medially to posterior fourth; ridges arepresent laterally but become progressively shorter toward the margin;second tergite reticulate laterally behind the ridges; third tergite 1.5times as wide as long, 2.4 times as long as the second, evenly pubescent,smoothly reticulate, shining; wings short, extending to the apex ofthe propodeum; black; legs dark brown, the tarsi and the tibiaeproximally reddish brown; last joint of each tarsus dark brown.Type locality.?Chilliwack, British Columbia.Type.?U.S.^M. No. 57782.Two specimens collected by Oscar ^Tiittaker on April 23 and May20, 1926.Paratype in Oscar Whittaker collection.
(17) TRIMORUS PALLIDIPES (Aslimead)Xenomerus pallidipes Ashmead, U. S. Nat. Mus. Bull. 45, p. 184, 1893 (female).
?
Brues, Genera insectonim, fasc. 80, p. 22, 1908.Trimorus pallidipes Kieffer, Andr6, Species des hyin^nopteres d'Europe etd'Alg^rie, vol. 11, p. 110, 1912.?Kieffer, Das 1'ierreich, Lief. 48, p. 180,1926 (female).Female.?Antennae, except three proximal joints of one, are lost.Mesonotum striatopunctate, rugose anteriorly. Scuteilum smooth,flattened, slightly roughened at anterior margin. Parapsidal groovesdistinct, complete.Type locality.?Arlington, Va.TyjM.?V.S.^.M. No. 24493.Ashmead's type was examined by the author in 1927 and the pre-ceding brief description made of it.
(18) TRIMORUS STRIOPUNCTATUS. new speciesFemale.?Length 2.36 mm. Head about twice as wide as long,about as wide as the thorax, arcuately concave posteriorly; fronssmooth, ^.vithout a median carina, without sculpture on upper halfexcept some small scattered punctures; below the frons is stronglycarinate except for a narrow median area, the carinae extendingnarrowly laterally to top of eye; occiput finely reticulate, aciculatemedially; cheeks finely striate; thorax about as wide as long, moder-
112 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98
ately convex above; mesonotiim rather thickly covered with punc-tures on anterior half, not rugose in this area; on posterior halfstrongly, more or less irregularly, longitudinally striate; parapsidalgrooves perceptible but not sharply defined, difficult to distinguishposteriorly in the coarse striation; scutellum strongly reticulate,high ridges separating the enclosed areas; metanotal spine abouthalf as long as the scutoUum, broad and shelf-like; lateral angles ofpropodeum projecting somewhat, subacute apically; abdomen 1.6times as long as wide, a little wider than the thorax; petiole 1.2 timesas wide as long, with about ten straight longitudinal ridges, withouta transverse depression, but with the anterior rim slightly reflexed;second tergite 1.7 times as wide as long, scarcely longer than thepetiole, with numerous longitudinal ridges as on the petiole, theseridges, however, diverging, lower and more widely separated than onthe petiole; surfaces between these flat, without sculpture; thirdtergite 1.3 times as wide as long, with numerous somewhat irregularlow longitudinal ridges, the intervals between these ridges punctateor with an UTegular sculpture ; medially on the third tergite the longi-tudinal ridges are obsolescent on posterior half; posterior margin ofthird tergite smooth, without sculpture; third and fourth sternitespunctate; following tergites with dense, impressed reticulation, thefourth and fifth with several transverse rows of large punctures; black;scape at extreme base, mandibles, except the teeth, all legs, exceptthe coxae, bright yellowish brown; wings tinged with brown.Male.?Length 2.07 mm. Similar generally to the female fromwhich it differs as follows: Head slightly narrower than the thorax;punctures on upper half of frons very few, inconspicuous; carinaelaterally on the frons more numerous, continuous above with those onthe cheeks; punctures anteriorly on the mesonotiun smaller than inthe female, the intervals between them greater than in the female;abdomen 1.7 times as long as wide, oval; second tergite about twiceas wide as long; third tergite nearly one and one-half times as wide aslong, a little more strongly sculptured than in the female, the lowirregular ridges present over the whole surface (except a narrow areaalong the lateral margin); antenna about 0.8 the length of the entirebody, filiform, the joints becoming narrower toward the apex; thirdjoint a little over twice as long as wide; fourth joint about twice aslong as wide; last joint about as long as the third, three times as longas wide, rounded apically; color as in the female except that the scapeis not distinctly lighter colored proximad and that the legs, exceptthe tarsi, are dark reddish brown.Type locality.?Glen Echo, Md.Other locality.?Mount Holly Springs, Pa.Type and allotype.?\J. S. N. M. No. 57783.Three females and two males collected by the author. The Glen
WASPS OF GENUS TRIMORUS?FOUTS 113Echo specimens bear the dates July 1926 and August 12, 1916.The Mount Holly Springs specimen was swept from wheat stubbleon May 17, 1920.Variation.?One of the two females from Glen Echo is 1.84 mm.long, the punctures on the frons are, as in the male, few and incon-spicuous, and the sculpture on the third tergite is somewhat finerthan in the type.
(19) TRIMORUS ERYTHROGASTER. new speciesMale.?Length 1.65 mm. Head 2.1 times as wide as long, a littlewider than the thorax, as wide as the abdomen; frons striate belowand laterally to the vertex, with a few small scattered punctures above,without a median carina, otherwise smooth, without sculpture;vertex and occiput smooth, unsculptured; cheeks with a few finestriae; scape nearly twice as long as the third joint, about five times aslong as the pedicel; pedicel as wide as long, a little thicker than thirdjoint; third joint about three times as long as thick, as long as thefourth, fifth, or sixth, ])ut a little thicker than any one of these joints;joints beyond the sixth missing; thorax 1.1 times as long as wide,convex dorsally; mesonotum very coarsely and thickly punctateanteriorly, smoother and with the punctures more widely separatedon posterior half; along the posterior margin the punctures are closetogether but not so deep as those on the front half of the mesonotum;parapsidal grooves complete; scutellum smooth, with a few smallscattered punctures; metanotal spine very sharp at apex, broadenedbasally, about half as long as the scutellum; wings faintly brownish,extending slightly less than a fourth the length of the abdomen pastthe latter's apex; abdomen 1.6 times as long as w^de, broadly roundedposteriorly; petiole scarcely longer than wide, with numerous longi-tudinal ridges its entire length, with a broad trough-shaped depressionacross anterior third; second tergite 1.45 times as wide $.s long, aslong as the petiole, with many slightly diverging ridges all of whichextend to posterior fifth; third tergite 1.8 times as wide as long, nearlytwice as long as the second, its whole surface covered with smallpunctures, these punctures thicker laterally; head black; thorax blackabove, reddish laterally and below; scape reddish brown, a littledarker toward apex; petiole and second tergite reddish, the rest ofthe abdomen dark reddish brown; legs yelloAvish brown.Type locality.-?Ai'lington, Va.r?/2;e.?U.S.N.M. No. 57784.One specimen collected by the author.
(20) TRIMORUS SULCATUS (Kieffer)Hoplogryon sulcaius Kieffer, Ark. Zool., vol. 1, p. 538, 1904 (male).Trimorus sulcatus, Kieffer, Das Tierreich, Lief. 48, p. 179, 1926.783388?48 A
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Type locality.?Texas.Type.?In Kieffer's collection.
(21) TRIMORUS ERYTHROPUS (Ashmead)Prosacantha erythropus Ashmead, U. S. Nat. Mus. Bull. 45, p. 195, 1893 (female).Hoplogryon erythropus, Kieffkr, Das Tierreich, Lief. 48, p. 226, 1926.Type locality.?District of Columbia.Type.?XJ.S.'N.M. No. 24511.Described from two specimens.
(22) TRIMORUS CROSBYI, new speciesFemale.?Length 2.0 mm. Head about 1.9 times as wide as long,slightly wider than the thorax; frons without a median carina exceptjust above antennae; frons immediately above bases of antennae andlaterally nearly to summits of eyes, and the genae, strongly striate;medially the frons is smooth, without sculpture; upper part of fronssparsely covered with small pmictures, otherwise without sculpture;occiput and genae posteriorly aciculate; scape about 1.3 times as longas the club, 1.12 times as long as the joints between scape and clubcombined; thorax scarcely longer than wide, as wide as the abdomen;mesonotmn thickly pubescent, with a rather strong, somewhat irregu-lar reticulation; the intervals between the areas are raised lines so thatthe areas themselves appear as small, shallow depressions; parapsidalgrooves appearing as irregidar punctate and roughened lines to aboutthe middle of the mesonotum; scutellum smooth, pubescent laterallyand on anterior half, sparsely punctate on anterior half; spine onmetanotum rather broad basally, sharp apically, reaching a littlebeyond the base of the petiole; posterior angles of propodemn aboutas long as the metanotal spine, acute at apices; abdomen about 1.3times as long as the head and thorax com.bined, about 1.8 times as longas wide, ovate; petiole traversed longitudinally by a number of ratherbroad gi-ooves which are separated one from another by roundedridges ; dorsal surface of the petiole no t elevated anteriorly and withouta transverse depression; second tergite with seven longitudinal groovesas on the petiole but these grooves wider, extending about to apicalfifth of the segment, each on posterior half traversed longitudinallyby a ridge (fig. 14) ; posterior to the grooves and ridges the secondtergite is smooth, without sculpture; third tergite traversed longitudi-nally by grooves on anterior half; these grooves are not like those onthe petiole and second tergite but are about half as wide as on thosesegments and narrow to sharp points apically; the intervals betweenthe grooves are flattened, not so convex; toward the middle of thesegment the gi-ooves become shallower as well as narrower and theintervals merge with the flat smooth surface posterior to them;laterally the third tergite is smooth, without sculpture except for a
WASPS OF GENUS TRIMORUS?FOUTS 115
few small setigeroiis punctures; except as noted the third tergite issmooth, without sculpture; wings faintly brownish, extending to theapex of the abdomen; black, scape at extreme base, mandibles, andlegs for the most part, stramineous ; front coxae, hind coxae posteriorly,femora and tibiae outwardly, and last joint of each tarsus brown.
Figure 14.
?
Trimorus crosbyi, new species: Dorsal view of abdomen. The granulatedareas on the fourth tergite show up somewhat more clearly in the drawing than they do onthe type specimen.Type locality.?Wolcoit, N. Y.Type.?V.S.N.M. No. 57785.One specunen collected by Prof. C. R. Crosby on May 23, 1923.It gives me great pleasure to name this species after the late ProfessorCrosby. This is but one of the many interesting new species that hecollected and sent to me for study.
(2.3) TRIMORUS DISTINCTUS, new species
Alale.?Length 1.80 mm. Plead a little less than twice as wide aslong, as wide as the thorax, 1.1 times as wide as the abdomen, sub-convex anteriorly, emarginate posteriorly; frons striate on lower halfand laterally to top of eye, with a few small scattered punctures, witha median carina on lower half; vertex impressed-reticulate laterally;occiput striate; cheeks reticulate along eye margin, striate otherwise;antennae about 0.9 the length of the entire body; scape a little thickerthan joints 3, 4, or 5, the latter subequal in thickness; third joint 2.5times as long as thick, fourth joint 2.8 times as long as thick; fifthjoint about t\vice as long as thick, obliquely excised on basal half;following joints subequal in tliickness and length, about twice as longas thick; last joint about three times as long as thick, pointed at apex;thorax a little longer than wide, convex dorsally; mesonotum reticu-late, transversely wrinkled anteriorly, with numerous rather smallshallow punctures except where wi-inkled ; parapsidal grooves complete;
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scutellum convex, with several small punctures along anterior margin,otherwise smooth, without sculpture; metanotal spine triangular,broad basally, acute apically, about half as long as the scutellum;wings hyaline, extending a little less than one-fourth the length of theabdomen past the latter's apex; abdomen 1.9 times as long as wide, alittle longer than the head and thorax combined, long-ovate, broadlyrounded posteriorly; petiole a little longer than wide, with a numberof longitudinal ridges its entire length, with a transverse trough-shaped depression at anterior third; second tergite 1.5 times as wideas long, 1.2 times as long as the petiole, with numerous parallel orslightly diverging ridges extending nearly to the apex; third tergite1.4 times as wide as long, sparsely pubescent laterally, striate onanterior half, the striae becoming finer as they approach the middle;third tergite, except as noted, is smooth, VAthout sculpture; thirdsternite with a few small scattered punctures; black; coxae very darkbrown; legs reddish brown, the femora and tibiae darker.Type locality.?Brownwood, Tex.TVpe.?U.S.N.M. No. 57786.One specimen collected in May 1924 by the author.
(24) TRIMORUS PERCURRENS. new speciesMale.?Length 1.78 mm. Head about twice as wide as long, aboutas wide as the thorax, indistinctly narrower than the abdomen; occi-put impressed reticulate; vertex smooth, without sculpture; frons
mostl}'" smooth, with a rather strong median carina to anterior ocellus;a number of smaller carinae from this large one just above the antennae;laterally, nearly to the summits of the eyes, the frons is strongly stri-ate; antennae filiform, about 1.1 times as long as the body; scape alittle wider than the other joints; following joints becoming graduallynarrower toward the apex of the antenna; scape a little shorter thanjoints 3 and 4 together; pedicel about as wide as long; thirdjoint about three times as long as wide; following joints subequal inlength, a little longer than the third, becoming gradually narrower;last joint about five times as long as thick; all joints, except the scape,thicldy covered with short hairs; thorax 1.1 times as long as wide,convex dorsally and evenly covered above with whitish hairs; meso-notum very finely reticulate, more strongly so anteriorly; parapsidalgrooves complete, narrow, sharply indicated, of equal width through-out; scutellum convex, smooth, without sculpture; spine on metano-tum moderately long, acute at apex; wings hyaline, extending about athird the length of the abdomen past the latter's apex; abdomen 1.64times as long as wide, a little more than on and one-half times as longas the thorax; petiole 1.36 times as wide as long, with a number oflongitudinal grooves extending very nearly to the margins, with a
WASPS OF GENUS TRIMORUS?FOUTS 117
transverse depression just before the middle; second tergite 1.3 timesas wide as long, 1,55 times as long as the petiole, with a number oflongitudinal ridges, those near the middle shorter than those next tothem on either side, extending from base to middle of segment; thelonger ridges reach the posterior third; all these ridges diverge fromone another, that is, the intervening grooves widen posteriorly; thu'dtergite 1.4 times as wide as long, tw^ce as long as the second, wavy-striate and reticulate on basal half, the markings very faint near themiddle of the segment; third tergite otherwise smooth, without sculp-ture, without pubescence except a few white hairs laterally; black;legs dark brown to black, the knees and anterior tibiae apicallybrownish.Type locality.?HoUyburn, British Columbia.r?/pe.?U.S.N.M. No. 57787.One specimen collected June 11, 1928, by Oscar Whittaker.
(25) TRIMORUS MINUTUS, new speciesFemale.?Length 1.14 mm. Head about twice as wide as long,as wide as the thorax, indistinctly narrower than the abdomen; frons,except a small spot on each side at malar space which is impressedreticulate, and vertex, polished, without sculpture; frons with avery fine median carina its entire length ; occiput impressed-reticulate
;
eyes pubescent; thorax about as wide as long; mesonotum shining,with a fine indistinct reticulate sculpture; parapsidal grooves com-plete, just as in improcerus, not finely and sharply indicated as inpercurrens but easily distinguished nevertheless; scutellum convex,reticulate basally, smooth apically, with sparse pubescence laterally;metanotal spine moderate in length, acute apically; wings extendinga little less than one-third the length of the abdomen past the latter'sapex; abdomen one and one-half times as long as wide, hardly widerthan the thorax; petiole 1.7 times as wide as long, with a few deeplongitudinal grooves dorsally, not elevated anteriorly or depressedtransversely; second tergite 1.5 times as wide as long, 1.25 times aslong as the petiole, the ridges on basal four-fifths sharp, parallel, themedian ones bifurcate apically; third tergite 1.3 times as wide as long,2.7 times as long as the second, smooth, with extremely faint wavy-reticulate sculpture, pubescent laterally; black; antennae dark brown,the scape yellowish toward base; wings brownish; legs 3^ellowishbrown, the swollen parts of femora and tibiae darker; petiole and baseof second segment reddish yellow.Type locality.?Glen Echo, Aid.
^2/2)6.?U.S.N.M. No. 57788.Two specimens collected April 16 and April 23, 1918, by the author.Paratype in Whittaker collection.
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(26) TBIMORUS TENUICOKNIS (Kieffer)Hoplogryon tenuicornis Kieffer, Berliner Ent. Zeitschr., vol 50, p. 263, 1905(male).?Brues, Bull. Wisconsin Nat. Hist. Soc, vol. 7, p. 121, 1909.TVimor us tenuicornis, Kieffer, Das Tierreich, Lief. 48, p. 180, 1926.Type locality.?San Mateo, Calif.Other locality.?Orcas Island, Wash. (Brues).Type.?In Kieffer collection.
(27) TRIMORUS LIONOTUS. new speciesMale.?Length 1.71 mm. Head 1.8 times as wide as long, a littlewider than the thorax, as wide as the abdomen; frons striate shortlybelow and on the sides to above middle of eye, with a fine carina toanterior ocellus, with several short striae below anterior ocellus,otherwise without sculpture; occiput impressed-reticulate, smoothposteriorly; cheeks famtly reticulate; antennae elongate, filiform,1.3 times as long as the body, the joints becoming gradually thinnertoward apex; scape about five times as long as thick, about five timesas long as the pedicel, the latter scarcely longer than thick; scape 1.7times as long as joint 3, 1.4 times as long as the termmal joint;joint 3 four times as long as thick, the following joints subequal inlength, the last one a little longer; thorax 1.2 times as long as wide,convex dorsally; mesonotum finely reticulate, the areas very small,finely and rather closely punctate, with some small transverselydirected wrinkles anteriorly, shortly striate posteriorly; parapsidalgrooves complete; scutellum smooth, without sculpture except a fewvery minute punctures on anterior half; metanotal spine narrow, notwidened basally, acute apically, about half as long as the scutellum;lateral angles of propodeum projecting a little, blunt apically; wingsabout three times as long as wide, projecting a little more than a thirdof the length of the abdomen past the latter's apex; abdomen 1.65times as long as wide, ovate, broadly rounded apically; petiole 1.45times as wide as long, with deep grooves to front margin, slightlydepressed across anterior third; second tergite 1.2 times as wide aslong, 1.6 times as long as the petiole, with numerous slightly divergingridges which extend medially to posterior third; these ridges shortertoward the sides of the segment; except for the ridges the second ter-gite is without sculpture; third tergite 1.35 times as wide as long,twice as long as the second, pubescent laterally and narrowly poste-riorly, without sculpture of any kind; following tergites smooth, with-out sculpture; black; scape, anterior and middle tibiae except atboth ends, and all tarsi, except first joint of each, fuscous; coxaeblack; femora dark brown; tibiae proxunally and distally and meta-tarsi yellowish brown; wings hyaline.Type locality.'?HoUyburn, British Columbia.Type.?V.S.l^.M. No. 57789.
WASPS OF GENUS TRIMORUS?FOUTS 119One specimen collected on September 9, 1929, by Oscar Whittaker.This species may possibly be the opposite sex of pictus,
(28) TRIMORUS PICTUS, new speciesFemale.?Length 1.73 mm. Head twice as wide as long, 1.2 times aswide as the thorax, 0.93 times as wide as the abdomen; vertex and oc-ciput with dense impressed reticulation, a little roughened medially;frons superiorly irregularly striatopunctate, pubescent, with a mediancarina to anterior ocellus, polished medially below; thorax about aswide as long; mesonotum roughened, scaly-punctate, the sculpturesomewhat stronger posteriorly ; parapsidal grooves complete but some-what irregular anteriorly; scutellum rather thickly pubescent, scaly-punctate anteriorly; metanotal spine short, acute at apex, its uppersurface excavated; wings pale fuscous, extending very little past theapex of the abdomen; petiole 1.55 times as wide as long, with a numberof deep longitudinal grooves, with a slight constriction just before themiddle; second tergite 1.35 times as wide as long, 1.55 times as long asthe petiole, with a number of deep grooves which extend medially toapical thhd; the ridges dividing these grooves are parallel or divergeslightly posteriorly; third tergite 1.45 times as wide as long, 2.2 timesas long as the second, smooth, without sculpture; abdomen finelypubescent except a broad median area from base to middle of the thu'dtergite; black; legs reddish brown (except black coxae), the anteriorfemora, tibiae, and apical joints of all tarsi darker.Type locality.?Hollyburn, British Columbia.Type.?V.S.N.M. No. 57790.Two specimens collected August 28, 1929 (paratype), and August27, 1930, by Oscar Wliittaker.Paratype in Whittaker collection.This species may be the opposite sex of lionotus. Although showingdifi'erences I would not hesitate to consider specific if they belongedto the same sex, their general appearance which is very similar, theirsimilarity in size, and the identical sculpture of the petiole and secondtergite make me doubtful whether they are really distinct.
(29) TRIMORUS IMPROCERUS. new speciesFemale.?Length 0.95 mm. Head about twice as wide as long,slightly wider than the thorax, about as vride as the abdomen; occiputfinely reticulate; vertex and frons smooth, without sculpture exceptfor a fine median carina on the frons, this carina stronger toward thebases of the antennae, gradually vanishing toward the anterior ocellus;mesonotum pubescent, with a very fine scaly-reticulate sculpture;parapsidal grooves complete, famt anteriorly, deeper and broaderposteriorly; scutellum polished, without distinct sculpture; spine onmetanotum short, triangular, acute apically; wings extending a third
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the length of the abdomen past the latter's apex; thorax a httlelonger than wide ; abdomen about one and three-fourths times as longas wide, convex dorsally; petiole about as long as wide, with a numberof longitudinal grooves its entire length, with a transverse depressionmedially; second tergite 1.2 times as wide as long, 1.25 times as long asthe petiole, with a number of diverging longitudinal ridges on basaltwo-thirds; third tergite not quite 1.3 times as wide as long, 2.2 timesas long as the second, smooth, without sculpture, with the pubescencevery fine, present only laterally; black; wings faint brownish; legsdark brown, the anterior tibiae at apices, other tibiae proximally, and
all tarsi yellowish.Type locality.?Chilliwack, British Columbia.TVt)^.?U.S.N.M. No. 57791.One specimen collected September 24, 1926, by Oscar Whittaker.
(30) TRIMORUS NGTABILIS, new speciesFemale.?Length 1.1 mm. Head as wide as the thorax; frons striatebelow, without sculpture otherwise except a delicate carina to anteriorocellus; in front of the ocellus this carina is extremely fine; thoraxabout as wide as long, as wide as the abdomen; mesonotum withsculpture similar to but stronger than that in improcerus ; scutellumpolished, Mdthout pubescence, with a few^ small punctures anteriorly;metanotal spine very short, acute; posterior angles of propodeumrounded; petiole about one and one-third times as wide as long, withlongitudinal ridges separated by deep grooves; second tergite one andone-third times as wide as and one and two-fifths times as long as thepetiole, with slightly diverging ridges nearly to apex ; third tergite 1 .4times as w4de as long, 2.5 times as long as the second, w^ithout sculp-ture of any kind; following tergites likewise without sculpture; frontwing extending about half the length of the abdomen past the latter'sapex; black; trochanters, and tarsi basally, brownish; wings faintlybrownish.Type locality.?Chilliwack, British Columbia.Type.? U.S.^.M. No. 57792.Two specimens collected May 9 and May 24, 1926, b}^ Oscar Whit-taker.Paratype in Whittaker collection.
(31) TRIxMORUS VARIUS, new speciesMale.-?Length 2.18 mm. Head tmce as wide as long, about aswide as the thorax, indistinctly wider than the abdomen ; frons striatebelow and on the sides, the striae continuous with those on the cheeks,w4th a median carina to anterior ocellus, and with a few scatteredpunctures above; frons, except as noted, smooth, without sculpture;occiput rather finely and irregularly striate; antennae 1.45 times as
WASPS OF GENUS TRIMORUS FOUTS 121
long as the body, filiform, the joints becoming gradually thinnertoward the apex; scape four times as long as thick, five times as longas the pedicel, 1.4 times as long as the third joint, 1.2 times as longas the fourth, 1.1 times as long as the fifth, 1.2 times as long as thetwelfth; fifth joint 1.2 times as long as the eleventh; last joint aboutseven times as long as thick, acuminate; thorax 1.1 times as long aswide, strongly convex above; mesonotum thickly covered with largepunctures which are less than their diameter apart, with a few wrinklesanteriorly; laterally the punctures are larger, forming a coarse reticu-lation; parapsidal grooves present as short deep grooves; scutellumcoarsely reticulate anteriorly, smooth and polished posteriorly;metanotal spine acuminate, gradually narrowed toward base, aboutas long as the scutellum, extending at right angle to the surface of thepropodeum; lateral angles of propodeum prominent, subacute; wingsthree times as long as wide, hyaline, extending half the length of theabdomen past the latter's apex; abdomen ovate, broadly roundedposteriorly, 1.8 times as long as wide; petiole 1.2 times as long aswide, with numerous longitudinal ridges which extend only part wayup on the broadly reflexed anterior margin; second tergite 1.2 timesas wide as long, scarcely longer than the petiole, with many slightlydiverging ridges of equal length extending to apical fifth ; third tergite1.4 times as wide as long, 1.8 times as long as the second, stronglystriate medially on basal half, less sU'ongly striate laterally on basalhalf, with a few scattered punctures, those toward the front somewhatlarger and deeper; the striae really extend a little way past the middleof the third tergite but they are, beyond this point, shallow, notsharply indicated; a broad area along the lateral margin is sparselypunctate, without striae; scape and pedicel yellowish brown; mandi-bles red; thorax reddish, the scutellum and the mesonotum (exceptlaterally and posteriorly) black; mesopleuron above and metapleuronmostly black; abdomen black, the petiole and base of second tergitered; legs entirely light yellowish brown.Type locality:?Cabin John, Md.T7/;>6.?U.S.N.M. No. 57793.One specimen collected July 30, 1924, by the author.
(32) TRIMORUS MARYLANDICUS (Ashinead)Prosacantha marylandica Ashmead, U. S. Nat. Mus. Bull. 45, p. 193, 1893.
?
Brues, Genera insectorum, fasc. 80, p. 22, 1908; Connecticut Nat. Hist.Surv. Bull. 22, p. 552, 1916.Hoplogryon marylandicus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 232, 1926.Female.?LiQTigih 2.41 mm. Head as wide as the thorax; frons with
a'^fine median carina to anterior ocellus; lower half of frons polished,impunctate, upper half with numerous, moderately large, shallow
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punctures; frons laterally striate to top of eye; occipute shining, indis-tinctly transversely aciculate; thorax scarcely longer than wide, aswide as the abdomen; mesonotum coarsely punctate, the puncturesarranged in more or less distinct rows posteriorly; scutellum punctatelike the anterior part of the mesonotum, with a small median polishedarea posteriorly; metanotal spine long, acute at apex, broad basally;abdomen 1.8 times as long as wide; petiole about as long as wide, withnumerous longitudinal ridges extending the entire length of the seg-ment, without a transverse depression, and without the anteriormargin reflexed; second tcrgite about one and one-fourth times aslong as the petiole, slightly wider than long, with numerous parallel orslightly diverging ridges which nearly reach the apex; all of theseridges extend equally far posteriorly, leaving a narrow polished borderbehind them; third tergite 1.4 times as wide as long, twice as long asthe second, strongly striate medially, the striae extending nearly to theapex, on lateral third irregularly striate with large scattered punc-tures; a row of small setigerous punctures limits the extension of thestriae posteriorly; fourth tergite punctate, reticulate anteriorly; wingsreaching the tip of the abdomen; black; scape brown proximad,fuscous on distal two-thirds; pedicel fuscous, brown at extreme apex;mandibles and legs reddish brown.Type locality.?Oakland, Md.Tt/^w.?U.S.N.M. No. 24505.Other localities.?Washington, D. C, and Cabin John, Md.Species redescribed from two female specimens collected by theauthor at Washington, June 25, 1920, and Cabin John, Md., July 14,1917. The Washington specimen was collected in a low, ratherswampy place in the Soldiers' Home Park. Both specimens werecompared with the type in the National Museum.
(33) TRIRIOEUS STRIATIFRONS (Ashmead)Prosacantha striatifrons Ashmead, U. S. Nat. Mus. Bull. 45, p. 188, 1893.Hoplogryon striatifrons, Kieffer, Das Tierreich, Lief. 48, p. 225, 1926.Type locality.?Jacksonville, Fla.Type.?U.S.'N.M. No. 24496.Originally described from one specimen.
(34) TRIMORUS RUBRIPES RUBRIPES, new species and varietyMale.?Length 3.25 mm. Head about as wide as the thorax, alittle wider than the abdomen, entirely, except the interocellar areaand a small area to the side of each lateral ocellus, covered with strongcarinae; frons with a strong median carina extending to the anteriorocellus; antenna slender, threadlike, the joints very gradually nar-rowing toward the apex of the antenna; scape slightly longer thanjoints 2 and 3 combined, about five times as long as thick;
WASPS OF GENUS TRIMORUS FOUTS 123
third joint about four times as long as thick, a httle more than oneand one-tenth times as long as the fourth, about one and one-fourthtimes as long as the fifth; fifth joint about three times as long asthick, the oblique excision reaching nearly to the basal two-fifths of thejoint; following joints becoming gradually thinner; last joint aboutfive times as long as thick, acute at apex, a little shorter than thethird; mesonotum strongly confluently punctate anteriorly, shallowlyumbilicately punctate medially, rugosostriate posteriorly; parapsidalgrooves briefly, indistinctly indicated posteriorly; scutellum shallowlyumbilicately punctate (like the mesonotum medially) ; spine of meta-notum long, acute, extending as far posteriorly as the base of thepetiole; wings brownish, extending a little past the apex of the abdo-men; abdomen about one and two-fifths times as long as the head andthorax combined, about two and two-fifths times as long as wide,seen from above elongate ovate in shape; petiole a little less than oneand one-half times as long as wide, with strong longitudinal carinaefrom base to apex; second tergite one and three-tenths times as longas wide, as wide as the petiole is long, carinate like the petiole; thirdtergite one and one-fourth times as wide as long, one and two-fifthstimes as long as the second, carinate like the first and second tergitesnearly to the apex, the median carinae not quite as long as those toeither side; laterally the tergite has a few small punctures; thirdtergite rather sparsely pubescent laterally; following tergites with fineimpressed reticulation except along the posterior margin of each one,
all of them with long white hairs, thicker laterally; third sternitestrongly striate; black; scape on proximal half dark rufous; coxaeblack except at apices where they are reddish brown; legs, except theterminal joint of each tarsus which is fuscous, reddish brown; mandi-bles yellowish brown, the tips reddish.Tyi)e locality.?Glen Echo, Md.Tyj)e.?\].S.^M. No. 57794.Three specimens collected hj the author on June 5, 1921 (type),and April 25, 1926.Paratype in Whittaker collection.Variation.?The two paratj^'pes have the scape dark reddish onlyat extreme base.TRIMORUS RUBRIPES RUFOCOXALIS, new varietyMale.?Length 3.67 mm. Similar to var. rubripes except as follows:Scape black except at extreme base where it is dark reddish; coxaereddish brown like the rest of the legs; posterior coxae darker at bases;
all carinae on the third tergite equally long.Type locality.?Glen Echo, Md.Type.?V.S.lSl.M. No. 57795.One specimen collected by the author.
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(35) TRIMORUS KANSASENSIS (Gahan)
Hoplogryon kansasensis Gahan, Proc. Ent. Soc. Washington, vol. 14, p. 7, 1912(female); U. S. Dept. Agr. Misc. Publ. 174, p. 146, 1933.Tyj>e locality.?M&n\mtt&n, Kans.Type.?V.S.N.M. No. 14354.This species was described from a specimen obtained from a cagein which experiments with the Hessian fly were being carried on, andMr. Gahan says in his original description that it is "possibly, thoughnot likely, a parasite of the fly."
(36) TRIMORUS STRIATIVENTRIS (Ashmead)
Prosacantha striaiiventris Ashmead, U. S. Nat. Mus. Bull. 45, p. 197, 1893 (male).Hoplogryon striaiiventris, Kieffer, Das Tierreich, Lief. 48, p. 225, 1926.Type locality.-?District of Columbia.Type.?V.S.N.M. No. 24517.Described from one collected specimen.
(37) TRIMORUS REPENTINUS. new speciesFemale.?Length 0.95 mm. Head 1.8 times as wide as long, 1.2times as wide as the thorax, scarcely wider than the abdomen, sub-convex anteriorly: frons shortly striate below on the sides, with afine median carina on lower half, otherwise without sculpture, smooth
;
vertex smooth, without sculpture; occiput impressed-reticulate ; cheeksaciculate; thorax a little longer than wide; mesonotum convex, reticu-late; parapsidal grooves represented by short broad depressionsposteriorly on the mesonotum; metanotal spine very short, a meretubercle; wings about four times as long as wide, with long cilia on
all margins, extending nearly half the length of the abdomen past thelatter's apex; abdomen 1.6 times as long as wide, 1.6 times as longas the thorax; petiole 1.5 times as wide as long, with numerous longi-tudinal ridges extending over the slightly uptm-ned anterior marginto the edge of the segment; second tergite 1.4 times as wide as long,1.5 times as long as the petiole, with deep parallel grooves to poste-rior third; the ridges between these grooves are flattened on topand widen posteriorly, merging with the flat polished surface of thesegment; third tergite 1.2 times as wide as long, 2.4 times as longas the second, longitudinally striate to apical fifth, the striae becom-ing finer and wavy posteriorly; dark brown; abdomen reddish brown;legs, including coxae, light yellowish brown; wings hyaline.Type locality.?Cabin John, Aid.Type.?V.S.N.M. No. 57796.Two specimens collected July 31, 1916, and June 30, 1917, by theauthor.Paratype in Whittaker collection.
WASPS OF GENUS TRIMORUS?FOUTS 125
(38) TRIMORUS BRUNNEIPES. new speciesFemale.?Length 0.98 mm. Head about twice as long as wide, aswide as the abdomen, distinctly wider than the thorax; frons with avery delicate median carina extending to upper third; lower part offrons and cheeks striate; frons otherwise smooth, without distinctsculpture; occiput finely reticulate; scape, following five joints com-bined, and club subequal in length; scape about five times as long asthick; mesonotimi thickly clothed with short whitish hairs, with adelicate sculpture, not distinctly reticulate or punctate but ratherleathery in appearance; parapsidal grooves absent; scutellum sparselypubescent, smooth, without distinct sculpture; spine on metanotumshort, acute at apex; posterior angles of propodeum rounded; wingsbrownish, extending about one-fom-th the length of the abdomen pastthe latter's apex; petiole twice as wide as long, with about nine longi-tudinal grooves separated by narrow, sharp ridges; second tergiteabout one and one-third times as wide as long, about twice as long asthe petiole, with about a dozen deep longitudinal grooves on basaltwo-thirds; these grooves are deep, considerably wider than those onthe petiole, and are equally wide throughout their length ; apical thirdof second tergite smooth, without sculpture; third tergite 1.45 timesas wide as long, twice as long as the second, with numerous groovesbasally which are similar to but narrower than, and not so deep as,those on the second tergite; medially these grooves reach the middleof the segment but they become gradually shorter toward the sides;terminal tergites smooth, without distinct sculpture; black; scape atextreme base brownish; trochanters and tibiae proxmiad yellowish;legs otherwise brown; petiole dark red.Type locality.?McLean Bogs, N. Y.T?/2)e.?U.S.N.M. No. 57797.One specimen collected May 16, 1925, by M. D. Leonard.
(39) TRIMORUS PUSILLUS (Ashmead)
Prosacantha pusilla Ashmead, U. S. Nat. Mus. Bull. 45, p. 192, 1893 (female).Hoplogryon pusillus, Kieffer, Das Tierreich, Lief. 48, p. 228, 1926.Type locality.?Jacksonville, Fla.Type.?U.S.'N.M. No. 24504.Described from a single specimen.
(40) TRIMORUS COLUMBIANUS (Ashmead)
Prosacantha columbiana Ashmead, U. S. Nat. Mus. Bull. 45, p. 194, 1893 (female).Hoplogryon cclumbianus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 226, 1926.Type locality.?District of Columbia.Tijpe.?V.S.'N.M. No. 24507.
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(41) TRIMORUS FLAVICOXA (Aehmead)Promcantha flaticoxa Ashmead, U. S. Nat. Mus. Bull. 45, p. 196, 1893 (female).Hoplogryon flavicoxa, Kieffeh, Genera insectoruin, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 231, 1926.Type locality.?Virginia.Type.?U.S.^M. No. 24512.Described from a single specimen.
(42) TRIMORUS XANTHOPUS. new speciesFemale.?Length 1.43 mm. Head about twice as wide as long, aswide as the thorax, as wide as the abdomen; frons with short striaebelow, narrowly striate laterally to middle of eyes, with small scatteredpunctures on upper half, with a fine median carina to anterior ocellus;vertex reticulate; occiput and cheeks smooth, without sculpture;thorax about as wide as long, convex above anteriorly, flattenedposteriorly; mesonotum strongly sculptured, coarsely and confluentlypunctate, the punctures more distinct medially, coarsely reticulateposteriorly, the enclosed areas large; parapsidal grooves brieflyindicated posteriorly, not clearly indicated; scutellum rouglilysculptured, with large punctures, a median posterior area smooth,polished; metanotal spine triangular in shape, broad basally, acuteapically, slightly more than half as long as the scutellum; abdomen1.75 times as long as wide, convex dorsally; petiole about as long aswide, with numerous longitudinal ridges extending its entire length,not elevated anteriorly and without a transverse depression; secoadtergite 1.2 times as wide as long, 1.3 times as long as the petiole, withmany parallel or slightly diverging ridges extending nearly to theposterior margin of the segment; third tergite 1.3 times as wide aslong, 2.2 times as long as the second, striate basally, these striaecontinued posteriorly as fine wavy aciculations nearly to the apex ofthe segment; third tergite sparsely pubescent laterally, withoutpubescence anteriorly and medially; black; scape and pedicel brown,the former somewhat paler basally; legs (including coxae) yellow;wings hyaline.Type locality.?Glen Echo, Md.TT/pe.?U.S.N.M. No. 57798.One specimen collected September 29, 1917, by the author.
(43) TRIMORUS FUSCIPENNIS (Ashmead)Prosacantha fuscipennif; Ashmead, Ent. Amer., vol. 3, p. 117, 1887 (male); U. S.Nat. Mus. Bull. 45, p. 194, 1893.HoplogrTjon fuscipennis, Kieffer, Genera insectorum, fa-^c. SOB, p. 9r., 1910; DasTierreich, Lief. 48, p. 225, 1926.Type locality.?Jacksonville, Fla.Type.?V.S.N.M. No. 24506.
WASPS OF GENUS TRIMORUS?FOUTS 127
Hi) TRIMORUS NIGRIPES (Ashmead)Prosacaniha nigripes Ashmead, U. S. Nat. Mus. Bull. 45, p. 188, 1893 (male,female)
.
Hoplogryon nigripes, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 225, 1926.Habitat.?^The Dalles and Portland, Oreg.Tyjm.?V.S.N.M. No. 24495.
"Described from specimens from Mr. H. F, Wickiiam."
(45) TRIMORUS JUCUNDUS. new speciesFemale.?Length 1.60 mm. Head about 1.7 times as wide as longseen from above, a little wider than the thorax; head with impressedreticulation except as follows: malar area and frons to about middleof eyes striate; frons with a median carina to anterior ocellus, thiscarina smaller toward the ocellus; an area to either side of this carinaon lower half of frons polished, without sculpture; occiput with a fevvirregular indistinct ridges ; scape about seven times as long as thick, alittle longer than the five followmg joints combined; third joint abouttwice as long as thick, subequal to the fourth; club a little shorter thanthe scape; mesonotum closely and rather finely punctate; parapsidalgrooves not present; scutellum closely impressed-reticulate ; spme onmetanotum moderately long, acute at apex; abdomen a little longerthan the head and thorax combined, intermediate in width betweenthe head and thorax; petiole about as long as wide, with deep longi-tudinal grooves separated by narrow rounded ridges; second tergiteabout as long as wide, nearly one and one-half times as long as thepetiole, with numerous longitudinal grooves about as wide as those onthe petiole; these grooves deep anteriorly, shallower posteriorly,reaching to apical one-fifth, each one becoming narrower posteriorly,separated from one another by narrow rounded ridges; third tergiteabout as long as wide, about 2.3 times as long as the second, onanterior half with grooves which are similar to but smaller than thoseon the second tergite; for a short way past the middle of the tergitethese grooves are replaced by fine wavy aciculae; apical third of thethird tergite finely reticulate; third sternite punctate; wings hyaline,extending about a sixth the length of the abdomen past its apex; black;legs (except coxae which are black to very dark brown) bright reddishbrown; tarsi brown.Type locality.?Glen Echo, Md.TVpe.?U.S.N.M. No. 57799.Three specimens collected by the author on March 3 and 18, 1926.Paratype in Whittaker collection.
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(46) TRIMORUS CARABORUM (Riley)Prosacanthus caraborum Riley, in Ashmead, U. S. Nat. Mus. Bull. 45, p. 191(male, female), pi. 8, fig. 4 (female), 1893.Hoplogryon caraborum, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 227, 1926.Type locality.?Washington, D. C.Other locality.?Arlington, Va.Type.?U.S.N.M. No. 2241.Described from specimens reared from eggs of a carabid beetle,Chlaenius impuncti/rons, and from specimens collected in Arlington,Va. (47) TRIMORUS LEONARDI, new speciesFemale.?Length 1.84 mm. Head about twice as wide as long,about as wide as the thorax; upper half of frons and vertex with a verydense impressed reticulation, coriaceous; occiput similarly but some-what more delicately sculptured; frons smooth medially, striatelaterally, with a sharp carina extending to the anterior ocellus;mesonotum and scutellum densely and finely punctate, subopaque;parapsidal grooves present as short shallow depressions posteriorly;spine on metanotmn rather short, acute; thorax scarcely longer thanwide, a little narrower than the abdomen; wings not quite reaching theapex of the abdomen; abdomen nearly one and two-thirds times aslong as wide; petiole 1.3 times as wide as long, with about a dozenlongitudinal grooves, with a pronounced transverse constriction justbefore the middle; second tergite twice as wide as long, twice as longas the petiole, with numerous longitudinal ridges extending to apicalfifth, these ridges parallel to one another or diverging somewhat pos-teriorly; third tergite 1.5 times as wide as long, 2.3 times as long as thesecond, finely reticulate and with a few low flattened ridges on anteriorthree-fifths, without distinct pubescence except laterally; third sternitestrongly striate; black; scape dark brown; flagellum piceous; trochant-ers yellow; coxae black; rest of legs reddish brown; wings brownish.Type locality.?AlcLean Bogs, N. Y.Type.?V.S.^.M. No. 57800.One specimen collected May 16, 1925, by M. D. Leonard.It is with pleasure that I dedicate this species to my friend Mr.Leonard. (48) TRIMORUS PUNCTIVENTRIS (Ashmead)
Prosacantha punctiventris Ashmead, U. S. Nat. Mus. Bull. 45, p. 192, 1893 (female).Hoplogryon punctiventris, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 227, 192G.lype locality.-?Fortress Mom-oe, Va.Other locality.?District of Columbia (male, not described).Type.?V.S.N.M. No. 24502.
WASPS OF GENUS TRIMORUS?FOUTS 129
(49) TRIMORUS ANNULICORNIS (Ashmcad)Prosacantha annulicornis Ashmead, U. S. Nat. Mas. Bull. 45, p. 188, 1893 (female).Hoplogryo7i annulicornis, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 231, 1926.Tyj>e locality.-?Washington, D. C.Type.?V.S.N.M. No. 2240.Paratypes in the National Museum and in the collection of theAmerican Entomological Society.
(50) TRIMORUS PLEURALIS (Ashinead)Prosacantha pleuralis Ashmeah, U. S. Nat. Mus. Bull. 45, p. 195, 1893 (female).Hoplogryon pleuralis, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 231, 1926.Type locality.-?District of Colmnbia.Type.?V.S.N.M. No. 24509.Described from two female specimens.
(51) TRIMORUS SCULPTURATUS, new speciesFemale.?Length 1.73 mm. Head about twice as wide as long, aswide as the thorax, slightly wider than the abdomen; occiput withoutsculpture except a few short wrinkles behind each lateral ocellus;vertex and upper half of frons with small widely scattered punctures
;
frons without a median carina except just above the antennae, striatebelow and narrowly on the sides up as far as the median ocellus ; thoraxa little wider than long; parapsidal grooves absent; mesonotum andscutellum regularly reticulate, the enclosed areas large and the mar-gins high; anteriorly the areas are smaller; spine on metanotum long,acute ; spines at lateral angles of propodemn likewise long and acute atapices; wings reachmg the apex of the abdomen; abdomen about oneand three-fourths times as long as wide, 1.7 times as long as thethorax; petiole one and one-third times as long as wide, with a hump-like elevation anteriorly, with about ten longitudinal ridges, theseridges not traversing the hump just mentioned; second tergite 1.4times as wide as long, as long as the petiole, with about 12 longi-tudinal ridges extending nearly to the apical margin; some of theseridges bifurcate near basal fourth; each of the intervening groovesequally wide thi-oughout its length or becoming somewhat widerapically ; third tergite one and one-third times as wide as long, two andone-fourth times as long as the second, strongly and fairly closelypunctate, the punctures arranged in more or less definite rows longi-tudinally; black; petiole, base of second abdominal segment, andthorax on sides, dark reddish brown; legs stramineous; scape lightbrown; mandibles yellow, the teeth reddish.Type locality.-?Glen Echo, Md.Type.?V.S.N.M. No. 57801.One specimen collected by the author in July,
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(52) TRIMORUS PETIOLATUS, new speciesFemale.?Length 1.0 mm. Head slightly wider than the thorax;head and dorsum of thorax moderately thickly covered with shortwhitish hairs; frons with a delicate median carina from antennal baseto anterior ocellus, striate at bases of mandibles on each side halfwaybetween the median carina and the inner margin of the eye and extend-ing upward as far as the middle of the eye is a narrow reticulate area
;
except for the striations and reticulations just mentioned the fronsis polished, without sculpture; vertex without distinct sculpture;mesonotum rather finely sculptured, not punctate, with indistinctpunctures; parapsidal grooves briefly indicated posteriorly; scutellumshining, with the anterior half somewhat roughened; spine on metano-tum sharp and rather long; abdomen a little more than one and one-third times as long as wide, widest just behind the middle; petiole andsecond tergite with numerous grooves separated by sharp ridges,these grooves becoming narrower posteriorly; second tergite polished,without sculptiu-e on apical half, twice as long as the first tergite;thu'd tergite one and one-half times as wide as long, two and three-tenths times as long as the second, very delicately reticulate over itsentire surface, sparsely pubescent laterally; wings normally developed,extending a little beyond the tip of the abdomen; black; legs yellowishbrown, the femora and tibiae medially darker; petiole rufous; mandi-bles yellow; wings faintly brownish.TyjJe locality.?Cinnamon Lake, Schuyler County, N. Y.Type.?V.S.N.M. No. 57802.One specimen collected on June 5, 1925, by Prof. C. R. Crosby,
(53) TRIMORUS RUFOCINCTUS. new speciesFemale.?Length 1.20 mm. Head about twice as wide as long, aswide as the thorax, with fine white pubescence except medially on thefrons; vertex and frons with dense impressed reticulation; frons abovesmooth, with small scattered punctures, smooth below, without sculp-ture except a fine median carina which extends to the anterior ocellus;thorax as wide as long, about as wide as the abdomen; mesonotumsubopaque, pubescent, densely finely punctate; parapsidal groovesbriefly indicated posteriorly; scutellum smooth, with fine sculptureanteriorly; spine on metanotum rather short, broad basally, acuteapically; wings extending a little past the apex of the abdomen,brownish; abdomen 1.7 times as long as wide; petiole one and one-third times as wide as long, with about a dozen longitudinal groovesdorsally, the grooves extending its entire length; petiole not elevatedanteriorly and without a transverse depression ; second tergite 1.5 timesas wide as long, 1.7 times as long as the petiole, with numerous ridgesnearly to its apex, these ridges parallel with one another or divergingposteriorly; third tergite 1.4 times as wide as long, two and one-fourth
WASPS OF GENUS TRIMORUS?FOUTS 131
times as long as the second, with impressed reticulation, the areasrather large, with pubescence only laterally; black; scape brown atbase; legs reddish, brown in part; petiole and base of second tergitereddish.Type locality.?Glen Echo, Md.Type and paratype.?U.S.N.M. No. 57803.Six females collected Jul}'" 21, 1921, by the author on low forestundergrowth along the Cabin John Creek.Paratype in collection of Oscar Whittaker.
(54) TRIMORUS FLAVOCINCTUS, new speciesFemale.?Length 1.14 mm. Head about twice as wide as long, alittle wider than the thorax, as wide as the abdomen, evenly covered,except for the frons medially, with short white pubescence; vertexand upper frons reticulate; frons otherwise smooth, without sculptureexcept for a fine median carina which extends to the anterior ocellus;thorax a little longer than wide, its upper surface covered, like thehead, with short white pubescence; mesonotum subopaque, reticulate-punctate; parapsidal grooves briefly indicated posteriorly; scutellumfinely reticulate; spine on metanotum moderate in length, acute atapex; wings extending a little past the apex of the abdomen; abdomen1.7 times as long as wide; petiole 1.6 times as wide as long, with a fewlongitudinal grooves, not elevated anteriorly or depressed trans-versely; second tergite 1.6 tunes as wide as long, 1.3 times as long asthe petiole, the ridges extending nearly to the apex, parallel or di-verging posteriorly; third tergite 1.3 times as wide as long, 2.7 timesas long as the second, without pubescence except laterally, smooth,delicately reticulate, the enclosed areas rather large; dark brown; scapeat base, and all legs light brown; mandibles, petiole, and base of secondtergite yellow; wings hyaline.Type locality.?McLean Bogs, N. Y.Type.?V.S.N.M. No. 57804.One specimen collected May 16, 1925, by M. D. Leonard.
(55) TRIMORUS XANTHOGNATHUS (Ashmead)Prosacantha xanthognaiha Ashmead, U. S. Nat. Mus. Bull. 45, p. 197, 1893 (male).Hoplogryon xanthognathus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 230, 1926.Type locality.?Jacksonville, Fla.7V2)g.?U.S.N.M. No. 24516.
(56) TRIMORUS CLARUS, new speciesFemale.?Length 1.83 mm. Head as wide as the thorax, subconvexanteriorly, moderately excavated behind, 1.8 times as wide as long;frons with a strong carina to anterior ocellus, shortly striate below,striate laterally to just above middle of eye, with a small reticulate
132 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98
area medially on each side just within the lateral striae, with smallscattered punctures above; vertex reticulate; occiput impressed retic-ulate; thorax a little longer than wide, convex dorsally; parapsidalgrooves short; mesonotum roughly sculptured, reticulate, irregularlytransversely wrinkled anteriorly, more strongly longitudinally wrinldedposteriorly; scutellum smooth, without sculpture, sparsely coveredwith fine hairs; metanotal spine triangular, broad at base, acute atapex, about half as long as the scutellum; wings faintly brownish,extending about one-ninth the length of the abdomen past the latter'sapex; abdomen 1.7 times as long as wide, 1.1 times as wide as thethorax, convex dorsally; petiole 1.3 times as wide as long, with severallongitudinal ridges extending its entire length, very slightly trans-versely depressed in front of middle; second tergite 1.2 times as wideas long, 1.6 times as long as the petiole, with numerous longitudinalparallel or diverging ridges to apical fifth; several of these ridgesbifurcate before middle; third tergite 1.45 times as wide as long, twiceas long as the second, sparsely pubescent laterallj'" and posteriorly,smooth, without sculpture of any kind; fourth tergite longer than thefollowing combined, finely reticulate anteriorly; black; legs darkbrown, the trochanters, tibiae basally and apically, and metatarsusof each leg, reddish brown.Type locality.?Hollyburn, British Columbia.T2/2)e.?U.S.N.M. No. 57805.One specimen collected on September 27, 1929, by Oscar Whittaker.
(57) TRIMORUS CALIFGRNICUS (Ashmead)Prosacantha californica Ashmead, U. S. Nat. Mus. Bull. 4.5, p. 190, 1S93 (female)Hoplogryon californicus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 229, 1926.Type locality.?Santa Cruz Mountains, Calif.Type.?U.S.^.M. No. 24499.
(58) TRIMORUS SILVATICUS. new speciesFemale.?Length 1.36 mm. Head about twice as wide as long, 1.1times as wide as the thorax, about as wide as the abdomen; occiputand vertex laterally with close impressed reticulation; frons striatebelow and laterally nearly to top of eye, pubescent above, with acarina to anterior ocellus ; thorax scarcely longer than wide ; mesonotumscaly-reticulate anteriorly, irregularly wrinkled posteriorly, subopaque,covered with short semierect hairs; parapsidal grooves briefly indi-cated posteriorly; scutellum smooth, without distinct sculpture; spineon metanotum rather short, acute; lateral angles of propodeum veryshort, tubercle-like; anterior wings nearly four times as long as wide,not quite attaining the tip of the abdomen, light brownish; abdomen1.75 times as long as wide, 1.75 times as long as the thorax; petiole
WASPS OF GENUS TRIMORUS?FOUTS 133
1.3 times as- wide as long, with a number of longitudinal grooves ex-tending to anterior fourth, not elevated anteriorly or depressed trans-versely; second tergite nearly 1.4 times as wide as long, 1.5 times aslong as the petiole, with numerous slightly diverging ridges on basalfour-fifths, the intervening grooves broad and shallow; third tergite1.4 times as wide as long, twice as long as the second, smooth, with-out sculpture, without pubescence except laterally and narrowlyposteriorly; black; legs dark brown; knees, anterior tibiae apicaliy,and tarsi yellowish brown; petiole very dark reddish.Type locality.?Hollyburn, British Columbia,Type.?U.S.ISIM. No. 57806.Two females collected on May 15 and June 9, 1928, by OscarWhittaker.Paratype in Wliittaker collection.
(59) TRIMORUS CRASSICORNIS (Kieffer)Hoplogryon crassicornis Kieffer, Berliner Ent. Zeitschr, vol. 50, p. 262, 1905;Das Tierreich, Lief. 48, p. 216, 1926.Habitat.?California: Santa Clara and San Mateo. Nevada:Ormsby.Type.?In Kieffer collection.
(60) TRIMORUS VIRGINIENSIS (Kieffer)Hoplogryon tibialis {non Foerster, 1841) Ashmead, U. S. Nat. Mus. Bull. 45, p. 203,1893 (female).
?
Brues, Genera insectorum, fasc. 80, p. 25, 1908.Hoplogryon virginiensis Kieffer, Genera insectorum, fasc. SOB, p. 98, 1910; DasTierreich, ^Lief. 48, p. 218, 1926.Type locality.?Virginia.Type.?V.S.N.M. No. 24523.Described from one specimen.
(61) TRIMORUS CLARIPENNIS (Ashmead)Hoplogryon claripennis Ashmead, U. S. Nat. Mus. Bull. 45, p: 203, 1893 (female) .
?
Brues, Genera insectorum, fasc. 80, p. 25, 1908.
?
Kieffer, Genera insectorum,fasc. 80B, p. 96, 1910.?Brues, Connecticut Geol .Nat. Hist. Surv. Bull. 22,p. 553, 1910.?Kieffer, Das Tierreich, Lief. 48, p. 218, 1926 (female).Female.?Length 1.34 mm. Head twice as wide as long, about aswide as the thorax, as wide as the abdomen; cheeks and extreme lowerpart of frons strongly striate; rest of frons and vertex polished;antermae fuscous, the base of scape paler; pedicel, third, and fourthjoint subequal in length and width, the pedicel a little shorter, abouttwice as long as wide; third and fourth joints a little over twiceas long as wide; mesonotum subopaque, slightly roughened, punc-tulate; parapsidal grooves faintly indicated as small depressionson each side posteriorly on the mesonotum; wings hyaline, roundedapicaliy, extending a little past the tip of the abdomen; abdomen1.65 times as long as wide, 1.6 times as long as the thorax; petiole
134 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98
about as wide as long, traversed longitudinally by deep grooves;second tergite with deep grooves medially to apical third, the groovesshorter laterally; area posterior to the grooves smooth, without sculp-ture; third tergite 1.35 times as wide as long, faintly reticulate;metanotal spine moderately long, acute at apex, extendinghorizontally.Type locality.-?Virginia.Redescribed from the type, U.S.N.M. No. 24524.
(62) TRIMORUS CONCINNUS. new nameHoploqryon coxalis Fours, Proc. Ent. Soc. Washington, vol. 27, p. 103, 1925(female); Cornell Univ. Mem. 101, p. 964, 1928.The name coxalis is preoccupied in Trimorus by coxalis Thomson(described in Prosacantha in 1859).Type locality.-?SufFern, N. Y.Type.?In the author's collection.Originally described from one specimen collected on May 26, 1924,by Prof. C. R. Crosby.The type of coxalis Fonts was compared with the type of virginiensisKieffer and appeared to differ only in having the abdomen about aslong as the head and the thorax combined. They may be identicalspecifically. (63) TRIMORUS PENNSYLVANICUS (Ashmead)Prosacantha pennsylvanica Ashmead, U. S. Nat. Mus. Bull. 45, p. 189, 1893(female)
.
Hoplogryon pennsylvanicus , Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910;Das Tierreich, Lief. 48, p. 228, 1926.Habitat
.
?Pennsylvania
.
Type.?In Berlin Museum.Described from one specimen,
(64) TRIMORUS BREVICARINATUS. new speciesFemale.?Length 0.90 mm. Head about twice as wide as long, alittle wider than the thorax, the latter as wide as the abdomen;occiput and \>ertex delicately reticulate; frons without sculptureexcept a fine median carina which does not quite reach the anteriorocellus; thorax as wide as long; mesonotum apparently finely reticu-late but the sculpture somewhat obscured by the short pubescence;scutellum smooth, slightly roughened anteriorly; parapsidal groovesabsent; spine on metanotum short, acute, less than half as long as thepetiole; wings about two and one-half times as wide as the cilia on thedistal margins are long, extending about a fourth the length of theabdomen past the latter's apex; abdomen 1.7 times as long as wide;petiole about as long as wide, shaped and sculptured as in monticolus,with a narrow row of longitudinal grooves across its middle; secondtergite 1.6 times as wide as long, 1.6 times as long as the petiole, with
WASPS OF GENUS TRIMORUS?FOUTS 135deep longitudinal grooves on anterior half; the grooves are narrowedto points apically and their edges are clear and sharp; the groovesare moreover not branched or divided, each one is distinct from everyother one; third tergite 1.4 times as wide as long, delicately reticulate;black; legs dark brown, the trochanters lighter; wings hyaline.Type locality.?Glen Echo, Md. (August 14, 1916.)Type.?V.S.N.M. No. 57807.Paratype Zoca/iifies.?Washington, D. C. (August 14, 1917), andBrownwood, Tex. (April 20, 1924), Pecan Bayou.Three females collected by the author on the dates and at the local-ities indicated above. The paratype from Washington was collectedon lawn grass.Paratype in Whittaker collection, 0.77 mm. in length.
(65) TRIMORUS PUNCTIGER. new speciesFemale.-?Length 1.80 mm. Head about as wide as the thorax, aswide as the abdomen; occiput shining, very faintly reticulate; an areabehmd each lateral ocellus impressed-reticulate ; frons smooth, sparselypunctate on upper half, striate below and on the sides; the striaebecome gradually less numerous as they approach the upper frons andvanish just above the middle of the eyes; the usual carina on the fronsis represented only by a short and famt suture in the middle of thefrons; thorax a little longer than wide; mesonotum punctate exceptposteriorly, the punctures rather large and shallow, more than theirdiameter distant from one another; posteriorly the mesonotum iscoarsely reticulate, the areas large and elongate anteroposteriorly
;
parapsidal grooves short, quickly lost in the coarse reticulation;scutellum coarsely reticulate like the posterior part of the mesonotumspine on metanotum in the form of a broad, roughly sculptured platewith a little rounded nipple at its apex; lateral angles of propodeumprominent, acute; wings extending slightly past the apex of the abdo-men, faintly brownish in color; abdomen a little more than one andone-half times as long as wide; petiole 1.1 times as wide as long, withabout a dozen strong longitudinal ridges, the intervening grooveswrinlded; there is no smooth area along the apical margin of the seg-ment as is usual, the ridges attaining the extreme edge; second tergitetwo and one-half times as wide as long, as long as the petiole,with numerous longitudinal ridges which extend to the apical fourthof the segment, the intervening grooves shallow, somewhat narrowerthan those on the petiole; third tergite 1.3 times as wide as long, 3.1times as long as the second, closely impressed-reticulate, anteriorlyfinely longitudinally wrinkled; no pubescence except sparsely on thesides; black; legs reddish brown; coxae dark brown; scape at basebrownish.Type locality.-?Glen Echo, Md.
136 PROCEEDINGS OF THE NATIONAL MUSEUM vol. esType?U.S.'NM. No. 57808.One specimen collected by the author.A remarkable species, easUy separated by many characters from anyspecies loiown to me.
(66) TRIMORUS NANUS (Ashmead)Prosacantha nana Ashmead, U. S. Nat. Mus. Bull. 45, p. 191, 1893 (female).Hoplogryon nanus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 229, 1926.Type locality.?Utah Lake, Utah.T?/i?e.?U.S.N. M. No. 24501.Originally described from a single female specimen.
(67) TRIMORUS LONGIPENNIS (Ashmead)Hoplogryon longipennis Ashmead, U. S. Nat. Mus. Bull. 45, p. 202, pi. 8, fig. 6,1893 (female).
?
Harrington, Trans. Roy. Soc. Canada, ser. 2, vol. 5, sect.4, p. 184, 1899 (male).
?
Brues, Genera insectorum, fasc. 80, p. 25, 1908.?
-
Kieffer, Genera insectorum, fasc. SOB, p. 97, 1910; Das Tierreich, Lief. 48,p. 217, 1926 (male, female).Prosacantha laevifrons Ashmead, U. S. Nat. Mus. Bull. 45, p. 190, 1893 (female).Hoplogrrjon pteridis Ashmead, ibid., p. 203 (female).
?
Brues, Genera insectorum,fasc. SO, p. 25, 1908.
?
Kieffer, Genera insectorum, fasc. SOB, p. 97, 1910;Das Tierreich, Lief. 48, p. 216, 1926 (female).Prosacantha levis Dalla Torre, Catalogus hymenopterorum, vol. 5, p. 507,1898.
?
Brues, Genera insectorum, fasc. 80, p. 22, 1908.Hoplogryon levis, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; Das Tier-reich, Lief. 48, p. 229, 1926 (female).Female.-?Length 0.97 mm. Head a little over twice as wide aslong, as wide as the thorax; upper part of frons, vertex, and occiputwith dense impressed reticulation, beadlike in appearance; low^erfrons medially smooth, without sculpture except a delicate impressionto anterior ocellus; frons laterally reticulate; clypeus, lower fronslaterally, and malar area, striate; thorax a little wider than long,decidedly flattened above, as wide as the abdomen; mesonotum closelyscaly reticulate, the sculpture strong, with short parapsidal groovesposteriorly; scutellum with sculpture which is similar to, but moredelicate than, that on the mesonotum; metanotal spine short, acute;wings subhyaline, extending a little past the apex of the abdomen;abdomen one and one-fourth times as long as wide, broadly ovate,rounded posteriorly; petiole about twice as wide as long, without atransverse depression and with the anterior margin not reflexed;second tergite a little more than twice as wide as long, with numerousparallel ridges to apical fourth; third tergite 1.5 times as wide as long,with uniform close impressed reticulation; black; scape dark reddishbrown; legs light brown, the femora and tibiae darker brown; coxaedark brown.
WASPS OF GENUS TRIMORUS?FOUTS 137
Description based on two specimens in the autlior's collection fromVirginia and Glen Echo, Md. The specimen from Virginia, collectedon July 13, was compared with the type of Hoplogryon pteridisAshmead and seemed to be conspecific with it. The specimen fromGlen Echo was compared with Ashmead 's type of Prosacantha laevi-rons with similar results. Some years ago the author had theopportunity of comparing the type of Prosacantha laevifrons withthe type of Hoplogryon longipennis and found no specific differencesbetween them.This species is known to occur in Ottawa, Canada; Fortress Monroeand Arlington, Va.; Glen Echo, Md.; a^nd the District of Columbia.Type.?V.S.NM. No. 24521 (longipennis).
(68) TRIMORUS NIGRICOXA. new speciesFigures 13, 15Female.?Length 1.63 mm. Head 2.2 times as wide as long, aswide as the thorax ; frons, except an area above the bases of the antennaeextending as far up as the middle of the eyes, and vertex with veryclose reticulate sculpture, beadlike in appearance; frons with a
Figure 15.
?
Trimorus nigricoxa, new species: Dorsal view of abdomen. Only part of thesculpture is shown on the third tergite, the reticulation being continuous.
strong carina from antenna to anterior ocellus; head, except the smootharea described above, and dorsal surface of thorax thickly coveredwith short white hairs; scape about one and one-sixth times as longas the club, the latter about equal in length to joints 2-6 inclusivecombined; mesonotum subopaque, very closely covered with smallpunctures; parapsidal grooves indicated as short broad depressions;
138 PROCEEDINGS OF THE NATIONAL MUSEUM vor,. 98
scutellum somewhat less strongly punctate than the mesonotuni;spine on mctanotum short, broad basally, acute apically; lateralangles of propodcum moderately produced, acute; abdomen broadlyelliptical, 1.1 times as wide as the thorax, 1.6 times as long as wide;petiole 1.5 times as wide as long, with eight or nine longitudinalgrooves separated by sharp ridges; second tergite 1.8 times as wideas long, 1.4 times as long as the petiole, with about ten grooves basally,these grooves deep anteriorly, becoming wider and shallower posteri-orly, separated by sharp ridges; these ridges extend to the apical fourthof the segment; the grooves become more and more shallow andmerge with the smooth area behind; third tegite 1.3 times as wide aslong, 2.4 times as long as the second, with unifomi impressed reticula-tion, pubescent only laterally; following tergites with close impressedreticulation, with fine scattered punctures; wings faintly brownish,extending slightly past the apex of the abdomen; black; trochanters,tibiae at extreme bases, and anterior tibiae at apices reddish yellow;femora and tibiae otherwise very dark brown; apical joints of tarsibrown.Type locality.?Chilliwack, British Columbia.7V2>?.?U.S.N.M. No. 57809.Five specimens collected by Oscar Whittaker on September 4, 6,and 8, 1926, and September 9 and 13, 1927. One paratype in Whit-taker collection.
(69) TRIMORUS WHITTAKEBI, new species
Female.?Length 1.16 mm. Head about twice as wide as long, a lit-tle wider than the thorax; frons reticulate laterally and above, smoothmedially, with a median ridge to anterior ocellus, evenly pubescentexcept on the smooth median area; vertex and occiput impressedreticulate; thorax as wide as long; mesonotum scaly-reticulate, evenlyand closely pubescent; parapsidal grooves apparently not present;scutellum very closely impressed-reticulate, pubescent; spine onmetanotum short-acute; lateral angles of propodeum projecting,acute; wings extending a little less than a third the length of theabdomen past the latter's apex; abdomen 1.4 times as long as wide, alittle wider than the head, slightly longer than the head and thoraxtogether; petiole twice as wide as long, with about a dozen longi-tudinal grooves which very nearly reach the margins of the segment,not elevated anteriorly and without a transverse depression; secondtergite twice as wide as long, twice as long as the petiole, with abouta dozen longitudinal ridges with deep hitervening grooves; theseridges are parallel or diverge slightly from one another posteriorly,extending to apical third ; thu'd tergite 1 .4 times as wide as long, im-pressed-reticulate, uniformly pubescent, 2.7 times as long as the
WASPS OF GENUS TRIMORUS?FOUTS 139
second; black; trochanters, knees, tibiae apically, and all tarsi red-dish brown; wings brownish.Type ^oca/%.?Chilliwack, British Columbia.ri/pe.?U.S.N.M. No. 57810.One specimen collected AprU 4, 1925, by Oscar Whittaker.It gives me great pleasure to name this interesting species after myfriend and collaborator Mr. Whittaker.
(70) TRIMORUS OBSCURUS, new speciesFemale.?Length 1.22 mm. Head about as wide as the thorax;vertex and upper half of frons impressed-reticulate ; frons otherwisewithout sculpture except a small reticulate area midway betweenantemia and eye on each side; frons with a fine median carina to theanterior ocellus; thorax about as wide as long, a little narrower thanthe abdomen; mesonotum and scutellum thickly clothed with shortwhitish pubescence, the former w4th a rough reticulation, the areasrather small; scutellum less strongly sculptured, impressed-reticulate;parapsidal grooves absent; spine on metanotum short, blunt, barelyprojecting; lateral angles of propodeum short, blunt; wings distinctlybrownish, extending a little past the apex of the abdomen; abdomen1.6 times as long as wide; petiole about as long as wide, not elevatedanteriorly and without a transverse constriction, with about 10 longi-tudinal grooves which very nearly reach both margins; second tergitetwice as wide as long, scarcely longer than the petiole, with about adozen strong longitudinal ridges which extend medially nearly to theposterior margin of the segment; the grooves between these ridgesare broad, and each is equally wide throughout its length or widenssomewhat posteriorly; third tergite 1.35 times as wide as long, 2.6times as long as the second, finely reticulate, the areas rather large,without pubescence medially on anterior half; black; knees, anteriortibiae apically, and tarsi, reddish brown.Type locality.?Chilliwack, British Columbia.TVpe.?U.S.N.M. No. 57811.Two specimens collected on August 22 and 29, 1926, by OscarWhittaker.Paratype in Wliittaker collection.
(71) TRIMORUS BILINEATUS (Ashmead)
Prosacantha bilineata Ashmead, U. S. Nat. Mus. Bull. 45, p. 194, 1893 (female).Hoplogryon bilineatus, Kieffer, Genera insectorum, fasc. SOB, p. 95; 1910; DasTierreich, Lief. 48, p. 2.30, 1926.Type locality.?Washington, D. C.Type.?V.S.^.M. No. 24508.Originally described from four female specimens.
140 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 98
(72) TRIMORUS PULCHELLUS, new speciesFemale.?Length 1 .56 mm. Head about twice as wide as long, aboutas wide as the abdomen, very httle wider than the thorax; vertex andocciput with impressed reticulation; frons smooth, with a few minutescattered punctures on upper half; below and on the sides thefrons is striate; median carina on frons inconspicuous and not presenton upper half; thorax about as wide as long; parapsidal grooves notpresent or obscured by the heavy wrinkles on the mesonotum; meso-notum on anterior half scaly- improssed-reticulate, the areas verysmall; posterior half of mesonotum with heavy irregular wrinkles, notreticulate; scutellum densely impressed-reticulate, the areas verysmall, about the size of those on the anterior half of the mesonotum;spine on metanotum very short, lamelliform, broadly rounded pos-teriorly; posterior angles of propodeum projecting slightly, acute;wings brownish, reaching the apex of the abdomen; abdomen notquite twice as long as wide; petiole about as long as Avide, distinctlybut not greatly elevated anteriorly, with about 12 longitudinal groovesits entire length; second tergite 1.3 times as wide as long, a littlelonger than the petiole, with about 12 longitudinal ridges nearlyreaching the posterior margin; the intervening grooves are flat, shal-low, with approximately parallel sides; third tergite 1.2 times aswide as long, 2.3 times as long as the second, impressed-reticulate,more strongly so anteriorly; pubescence on third tergite sparse,present only laterally and posteriorly; black; knees, tibiae apically,and tarsi, except distal joints, reddish brown.Type locality.?Chilliwack, British Columbia.T^/pe.?U.S.N.M. No. 57812.Two specimens collected April 1, 1926, and June 12, 1927, by OscarWhittaker.Paratype in Whittaker collection,
(73) TRIMORUS VINCTUS. new nameHoplogryon similis Fouts, Proc. Ent. Soc. Washington, vol. 26, p. 160, 1924.The name similis is preoccupied in Trimorus by similis Thomson(described in Prosacantha in 1859).Type locality.?Ames, Iowa.Type.?V.S.IS^.M. No. 26833.
(74) TRIMORUS MONTICOLA. new speciesFemale.?Length 0.88 mm. Head a little wider than the thorax;vertex smooth; occiput apparently delicately reticulate; frons smooth,without sculpture except a few fine striae below on the sides; mediancarina on frons not extending past the middle; thorax about as wideas long, as wide as the abdomen; mesonotum and scutellum pubescent,the hairs obscuring the very delicate sculpture; parapsidal grooves
WASPS OF GENUS TRIMORUS?FOUTS 141
absent; spine on metanotum short, acute; lateral angles of propodeumnot projecting; wings extending about one-fourth the length of theabdomen past the latter's apex, hyaline, the cilia on the distalmargins about a third as long as the wing is wide; abdomen 1.7 timesas long as wide; petiole about as long as wide, with a row of shortlongitudinal grooves across its middle, otherwise smooth, withoutsculpture dorsally; second tergite twice as wide as long, 1.2 times aslong as the petiole, with deep longitudinal grooves on anterior two-tliirds; the ridges or intervals are parallel to each other and do nobrandling posteriorly; third tergite twice as wide as long, 1.7 times aslong as the second, uniformly finely reticulate, the areas large andelongate anteropostcriorly ; dark reddish brown; legs dark brown, thetrochanters and anterior tibiae apically, yellowish.Type locality.?Mount Holly Springs, Pa.r?/i?e.?U.S.N.M. No. 57813.One specimen swept from wheat by the author (July 16, 1920).
(75) TRIMORUS TEXANUS, new speciesFemale.?Length 1.62 mm. Head as wide as the thorax, a littlewider than the abdomen; vertex finely reticulate laterally; occiputsmooth, faintly reticulate; frons smooth, not reticulate, with amedian carma extending to the anterior ocellus, striate laterally onlower half with a few minute scattered punctures above; mesonotumshagreened, shinmg, covered, as is also the scutellum with shortwhitish hairs; parapsidal grooves not sharply defined, nearly reachingthe middle of the mesonotum; scutellum smooth, indistinctly shag-reened anteriorly; spine on metanotum long, sharp at apex, nearlyas long as the scutellum; lateral angles of propodeum projecting,acute; wings hyaline, extending a little more than one-fourth thelength of the abdomen past the latter's apex; abdomen 1.7 times aslong as wide; petiole about as long as wide, with a smooth roundedelevation anteriorly, the grooves, about ten in number, reaching tothe middle of the segment; second tergite 1.3 times as wide as long,1.5 times as long as the petiole, the ridges, which are mostly bifurcatemedially, extending to posterior fourth; third tergite 1.5 times aswide as long, 1.8 times as long as the second, with an evenly (exceptnarrowly laterally and posteriorly) distributed impressed reticula-tion, not pubescent medially; black; legs mostly light reddish brown;coxae, tibiae, except proximally, and posterior femora apically,fuscous.Type locality.?Brownwood, Tex.Type.?U.^.^.M. No. 57814.One specimen collected on May 1, 1924, in Pecan Bayou by theauthor.
142 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98
(7C) TRIMORUS MINOR, new speciesFemale.-?Longth 1.50 mm. Head about two and one-fourth timesas wide as long, as wide as the thorax, about as wide as tlie abdomen;occiput reticulate; vertex smooth; frons mostly sm^ooth, withoutsculpture, striate just above the antennae and a spot on each sideat about the middle of the eyes reticulate; thorax a little wider thanlong; mesonotum rather delicately scaly-reticulate, without a traceof parapsidal grooves; scutellum smooth, with a fine scal^- reticulationanteriorly; spine on metanotum long, sharp, nearly as long as thepetiole; lateral angles of propodeum projecting slightly, acute; wingshyaline, extending about one-seventh the length of the abdomenpast the latter's apex; abdomen one and three-fourths times as longas wide, nearly 1.9 times as long as the thorax; petiole about as longas wide, not distinctly elevated anteriorly, the grooves not reachingthe anterior margin medially; posterior fifth of the petiole smooth,without sculpture; second tergite 1.5 times as wide as long, 1.6 timesas long as the petiole, traversed on basal three-fomlhs by numerousdeep longitudinal grooves; the intervening ridges are flattened dor-sally and become wider posteriorly; the upper edges of these ridges areon a level with the smooth surface behind them; third tergite 1.4times as wide as long, twice as long as the second, uniformly finelyreticulate, the areas moderately large; third tergite pubescent onlylaterally, polished along the posterior margin; black; coxae darkbrown; legs mostly light brownish.Type locality.?Rosslyn, Va.r^i>e.?U.S.N.M. No. 57815.One specimen collected on June 8 by the author.
(77) TRIMORUS MELANOPUS (Ashmead)Prosacantha melanopus Ashmead, U. S. Nat. r^Ius. Bull. 45, p. 189, 1893 (female).
?
Brues, Genera insectorum, fa^c. 80, p. 22, 1908.Hoplogryon melanopus, Kxeffer, Genera insectorum, fasc. 80B, p. 95, 1910; DasTierreich, Lief. 48, p. 228, 1926 (female).Female.?Length 1.47 mm. Head twice as wide as long, slightlywider than the thorax, the latter as wide as the abdomen; fronsstriate below, reticulate except medially below, less strongly reticulatemedially on the sides, the reticulation impressed below on the sidesand above; vertex and occiput impressed, the sculpture beadiike;frons with a median carina nearly to anterior ocellus, the carina re-placed hj a thin line just below the ocellus; thorax as wide as long,strongly convex dorsally ; mesonotum and scutellum evenly pubescent,finely scaly-reticulate; parapsidal grooves on posterior third, indis-tinct; metanotal spine triangular viewed from above, acute apically,about half as long as the scutellum; lateral angles of propodeum pro-jecting slightly, blunt apically; wings tinged with brown, reaching
WASPS OF GENUS TRIMORUS?FOUTS 143
to the tip of the abdomen; abdomen 1.6 times as long as wide; petiole1.35 times as wide as long, with num^erous grooves to anterior marginwhich is narrowly refiexed, without a transverse depression; secondtergite twice as wide as long, 1.3 times as long as the petiole, withparallel or slightly diverging ridges to apical fom^th; laterally wherethe ridges are shorter, the surface is impressed reticulate; third tergite1.45 times as Made as long, 2.1 tunes as long as the second, very stronglyimpressed reticulate, faintly reticulate laterally, polished narrowlyalong posterior margui; fourth tergite impressed-reticulate anteriorly;following tergites smooth, without sculptiu-e; black; legs dark brown,the knees, tibiae distally, and tarsi, except termmal joints reddishbrown.Type locality.?Ottawa, Canada.T?/2?e.?U.S.N.M. No. 24497.New locality.-?Chilliwack, British Columbia.Redescribed from one specimen collected June 9, 1926, by OscarWhittaker. This specimen was compared with the type of melanopusin the National Museum at Washington.
(78) TRIMORUS RETICULATUS, new speciesFemale.?hength 1.17 mm. Head about as wide as the thorax, alittle wider than the abdomen; vertex, occiput, and frons above, andbelow on the sides, with unpressed reticulation ; a few small puncturesin the reticulation above on the frons ; frons with a fine median carinato median ocellus, otherwise, except as noted above, smooth, withoutsculpture; thorax as wide as long, about as wide as the abdomen;mesonotum and scutellum smooth, with a fine, somewhat indistinct,reticulation; parapsidal grooves short; metanotal spine moderatelylong, acute apically; lateral angles of propodeiun rather long, acute;wings hyaline, extending nearly a fifth the length of the abdomen pastthe latter's apex; abdomen 1.6 times as long as wide; petiole abouttwice as wide as long, evenlj'' rounded above, with about twelvelongitudinal grooves extending to the anterior margin; petiole notelevated anteriorly and with a transverse depression; second tergite1.8 times as wide as long, 1.4 times as long as the petiole, with abouttwelve grooves extending to apical third; thhd tergite 1.45 times aswide as long, 2.4 times as long as the second, with uniform, moderatelyimpressed reticulation over its entire surface (except narrowly laterallyand posteriorly), without pubescence medially; black; legs darkbrown, the trochanters, knees, anterior tibiae apically, and tarsi,lighter.Type locality.?Glen Echo, Md.Type.?V.S.N.M. No. 57816.One specimen collected in August 1922 by the author.
144 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ss
(79) TRIMORUS FUMIPENNIS (Ashmead)Gryon fumipennis Ashmead, U. S. Nat. Mus. Bull. 45, p. 206, 1893 (female).
?
Brues, Genera insectorum, fasc. 80, p. 25, 1908.Paragryon Jumipemiis, Kieffer, Genera insectorum, fasc. SOB, p. 99, 1910.Brues, Connecticut Geol. Nat. Hist. Surv. Bull. 22, p. 553, 1916.
?
Kieffer,Das Tierreich, Lief. 48, p. 236, 1926 (female).Female:?Length 1.33 mm. Head 1.9 times as wide as long, a littlewider than the thorax, the latter as wide as the abdomen; fronsshortly striate below on the sides, with a fine median carina to anteriorocellus, with very fine punctures above; vertex and occiput reticulate,the areas small; thorax about as wide as long, subconvex above;mesonotum scaly-reticulate anteriorly, with a few transverse wrinkles,closely punctate posteriorly, with parapsidal grooves short; scutellumsubconvex, reticulate anteriorly, polished posteriorly; metanotal spineshort, acute; wings hyaline, about reaching tip of abdomen; lateralangles of propodeum short, blunt; abdomen twice as long as wide,about twice as long as the thorax, elliptical seen from above; petioleabout 1.4 times as long as wide, with fine ridges to anterior margin,the dorsal surface sloping gradually upward to anterior margin from anarrow trough-shaped transverse depression near apex; second tergite1 .3 times as wide as long, 1 .3 times as long as the petiole, with numerousslightly diverging ridges nearly to apex, all the ridges of approximatelyequal length; narrow area behind the ridges polished; third tergite 1.2times as wide as long, 2.2 times as long as the second, uniformlyimpressed reticulate except laterally where it is faintly reticulate, andposteriorly where it is narrowly polished; tergites 4-6 reticulate ante-riorly; body the color of mahogany; antennae piceous, the scape darkbrown, yellowish brown on proximal half; legs, including coxae,stramineous.Type locality.?District of Columbia.77/2)6?U.S.N.M. No. 24528.New locality:?Jacksonville, Fla.Redescribed from one specimen in the author's collection. It wascompared with the type of Gryon fumipennis Ashmead.
(80) TRIMORUS SCHWARZII (Ashmead)Prosacantha schwarzii Ashmead, U. S. Nat. Mus. Bull. 45, p. 192, 1893 (female).Hoplogryon achwarzii, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 232, 1926.Type locality:?Washington, D. C.T^^e.?U.S.N.M. No. 24503.Originally described from one female specimen.
(81) TRIMORUS NIGROBRUNNEUS, new speciesFemale:?Length 1.16 mm. Head twice as wide as long, about aswide as the thorax; occiput and vertex with dense impressed reticula-
WASPS OF GENUS TRIMORUS?FOUTS 145
tion; laterally and above the frons is reticulate, below it is striate,medially it has a fine carina to anterior ocellus, otherwise smooth,without sculpture; mesonotum and scutellum uniformly pubescent,the former with a rather fine scaly-reticulate sculpture, the lattersmooth, with a slightly roughened reticulate sculpture anteriorly;parapsidal grooves not present; spine on metanotum short, acute;thorax as wide as long; lateral angles of the propodeum about aslong as the metanotal spine, subacute apically; wings extending alittle less than a sixth the length of the abdomen past the latter'sapex, lightly tinged with brown; abdomen nearly one and one-halftimes as long as wide, about one and one-eighth times as wide asthe head; petiole about 1.7 times as wide as long, with a distinct butnot deep transverse constriction, and with grooves which extend fromits narrow polished posterior margin to its still narrower smoothanterior margin; second tergite about twice as wide as long, 1.4 timesas long as the petiole, with about ten strong longitudinal ridges toposterior fourth, these ridges diverging from one another posteriorly;the intervening grooves are broad, with flat, smooth bottoms; thirdtergite 1.35 times as wide as long, 2.8 times as long as the second,uniformly finely reticulate, the impressions somewhat deeper andmore strongly indicated anteriorly; black; legs brownish, the femoraand tibiae in part somewhat darker.Tyjpe locality.?Sudley, Md.r^^je.?U.S.N.M. No. 57817.One specimen collected on July 5, 1925, by the author.
(82) TRIMORUS PERSPICUUS, new speciesFemale.?Length 1.19 nmi. Head about twice as wide as long, alittle wider than the thorax, as wide as the abdomen, rather stronglyconvex anteriorly; frons striate shortly below, with a fine mediancarina from antennae to about the middle, with several small, indis-tinct punctures, otherwise without sculpture; occiput reticulate;cheeks finely reticulate; thorax a little longer than wide, convexdorsally; parapsidal grooves faintly indicated at base of mesonotum;mesonotum shining, with a faint reticulate sculpture; scutellumsmooth, polished, with fine sculpture along the anterior margin;wings hyaline, extending about two-fifths the length of the abdomenpast the latter's apex; abdomen 1.4 times as long as wide; petioleabout twice as wide as long, with the anterior edge upturned, with anumber of longitudinal ridges extending to the anterior margin; secondtergite twice as wide as long, 1.4 times as long as the petiole, withnumerous longitudinal ridges extending medially to posterior fourth;the grooves medially on the second tergite become narrower poste-riorly, the intervening ridges flattened above, becoming wider behind
146 PROCEEDINGS OF THE NATIONAL MUSEUM vor,. os
where they merge into the flat poUshed border of the segment; thirdtergite 1.5 times as wide as long, 2.4 times as long as the second,evenly reticulate except laterally, and narrowly posteriorly, the areasrather small; pubescence sparse laterally on the third tergite, notpresent except laterally; black; legs dark brown, the knees and tarsipaler.Type locality.?HoWyhnvn, British Columbia.Ti/^e.?U.S.N.M. No. 57818.One specimen collected on August 25, 1928, by Oscar Wliittaker.
(83) TRIMORUS AMABILIS, new speciesFemale.?Length 1.33 mm. Head about twice as wide as long, aswide as the thorax, as wide as the abdomen; malar area striate; Ironsjust above malar areas reticulate; frons delicately reticulate and withdistinct punctures above, with a median carma which vanishes aboveabout midway between the antennae and the anterior ocellus; exceptas noted the frons is smooth, unsculptured ; scape about seven times aslong as thick, about one and one-third times as long as the five follow-ing joints combined; third joint about one and one-half times as longas thick, subequal to the fourth; club about as long as the scape;mesonotum and scutellum reticulate, with rather thick pubescence;parapsidal grooves not indicated; spine on metanotum rather broadanteriorly, acute at apex, reaching above middle of petiole; lateralposterior angles of propodeum projecting slightly, acute; abdomen notquite one and one-half times as long as wide, a little longer than thehead and thorax combined; petiole nearly twice as wide as long, withnumerous longitudinal grooves separated by naiTOwly rounded ridges,these grooves extending nearly to the apex of the segment; viewedfrom the side the upper edge of the petiole is straight; second tergitetwice as wide as long, not quite twice as long as the petiole, with anumber of grooves basally which are considerably wider than those onthe petiole; these grooves medially on the segment become narrowerposteriorly and extend about to the apical fourth ; behind these groovesthe surface of the second tergite is smooth, without sculpture; thirdtergite one and one-half times as wide as long, two and one-half timesas long as the second, entirely closely reticulate, shining; wings lightbrownish, extending slightly past the apex of the abdomen; black;trochanters, femora at extreme apices, tibiae at extreme bases andapices, and metatarsus of each leg reddish brown.Type locality.-?Chilliwack, British Columbia.7V2>e.?U.S.N.M. No. 57819.Two specimens collected by Oscar Whittaker on May 29 and May30, 1926. Paratype in Whittaker collection.
WASPS OF GENUS TRIMORUS FOUTS 147
(84) TRIMORUS LEPID US. new speciesFemale.?Longth 1.07 mm. Head about twice as wide as long, 1.1times as wide as the thorax, a Uttle wider than the abdomen; fronssmooth, without sculpture except a small reticulate spot below oneither side, with a fine carina extending to median ocellus ; vertex with-out sculpture; occiput finely reticulate; thorax slightly longer thanwide, a little narrower than the abdomen; mesonotum finely scaly-reticulate, apparently without parapsidal grooves; scutellum smoothposteriorly, reticulate anteriorly; spine on metanotum short, acuteapically; lateral angles of propodeum projecting, blunt; wings extend-ing two-fifths the length of the abdomen past the latter's apex;abdomen 1.6 times as long as wide; petiole about twice as wide as long,with a number of grooves which extend to the very narrowly reflexedanterior margin; second tergite 1.7 times as wide as long, 1.6 times aslong as the petiole, sculptured as in perspicuus, except that the ridgesextend to apical third; third tergite 1.4 times as wide as long, 2.45times as long as the second, evenly reticulate, without pubescenceexcept laterally where it is sparse; pubescence everywhere on the bodysparse and fine; black; legs dark brown, the trochanters, knees, tibiaeapically, and tarsi except distally, somewhat lighter; mngs lightbrownish.TTjpe locality.?Hollyburn, British Columbia.Type.?V.S.'N.M. No. 57820.Two females collected June 9, 1928, and September 27, 1929, byOscar Whittaker. Paratype m Whittaker collection.NEARCTIC SPECIES NOT INCLUDED IN THE KEYTRIMORUS BETHUNEI (Sanders)Hoplogryon bethunei Sanders, Can. Ent., vol. 42, p. 15, 1910 (male).
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Kieffer,Genera insectorum, fasc. SOB, p. 96, 1910; Das Tierreich, Lief. 48, p. 214,1926 (male).Mr. Sanders's description, although very good, does not includeinformation necessary to splace the species in the key. No mentionis made of the presence or absence of the parapsidal grooves, of thesculpture of the third sternite, or of the color of the coxae.Type locality.?Aurora, 111.One specimen collected June 15, 1909, in the nest of Formicasubruja.Type.?In Illinois State Laboratory of Natural History, Ace. No.39771. TRIMORUS GRACILICORNIS (Ashmead)Prosacantha gracilicornis Ashmead, U. S. Nat. Mus. Bull. 45, p. 193, 1893(female).
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Brues, Genera insectorum, fasc, 80, p. 22, 1908.Hoplogryon gracilicornis, Kieffer, Genera insectorum, fasc. 80B, p. 95, 1910;Das Tierreich, Lief. 48, p. 228, 1926 (female).
148 PROCEEDINGS OF THE NATIONAL MUSEUM vol.98Runs to couplet 45 in the key to the species. The original descrip-tion fails to mention the sculpture of the third sternite.Type locality.-?Carolina.Type.?In Berlin Museum.TRIMORUS LINELLII (Ashmead)
Prosacayitha linellii .\shmead, U. S. Nat. Mus. Bull. 45, p. 195, 1893 (female).
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BRUiiis, Genera insectorum, fasc. 80, p. 22, 1908.Iloplogryon linellii, Kieffek, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 226, 1926 (female).?Fouts,- Cornell Univ. Mem. 101,p. 964, 1928.Runs to couplet 41 in the key to the species. This species was notstudied when the original key was made by the author, and soAshmead's description must be used ui placing it. The finely rugosesculpture of the mesonotum and scutellum serves to separate it fromallied species that have the mesonotum punctate.Type locality.?hong Island, N. Y.2Vpg.?U.S.N .M. No. 24510.TRIMORUS MACROCERUS (Ashmead)Prosacantha macrocera Ashmead, Ent. Amer., vol. 3, p. 117, 1887 (male).Cresson, Synopsis of families and genera of Hyraenoptera of America northof Mexico, p. 313, 1887.?Ashmead, U. S. Nat. Mus. Bull. 45, p. 197, 1893(male).
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Brues, Genera insectorum, fasc. 80, p. 22, 1908.Iloplogryon macrocerus, Kieffer, Genera insectorum, fasc. SOB, p. 95, 1910; DasTierreich, Lief. 48, p. 226, 1926 (male).Runs to couplet 34 in the key to the species. Further informationis necessary before the species can be satisfactorily placed in the key.Type locality.?Jacksonville, Fla.T?/2?e.?U.S.N.M. No. 24515.TRIMORUS MINUTISSIMUS (Ashmead)Prosacantha minutissima A&hmead, Ent. Amer., vol. 3, p. 117, 1887 (female).Cresson, Synopsis of families and genera of Hymenoptera of America northof Mexico, p. 313, 1887.Iloplogryon yninutissirnus, Ashmead, V. S. Nat. Mus. Bull. 45, p. 202, 1893(female).
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Brues, Genera insectorum, fas. 80, p. 25, 1908.
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Kieffer,Genera insectorum, fasc. SOB, p. 97, 1910.
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Brues, Connecticut Geol. Nat.Hist. Surv. Bull. 22, p. 553, 1916.?Kieffer, Das Tierreich, Lief. 48, p. 217,1926 (female).Runs to couplet 59 in the key to the species. Differs from silvaticusin having the wings extending a little beyond the tip of the abdomen.From calijornicus it differs in being smaller, 0.75 mm. as against 1.8in calijornicus.Type locality.?Jacksonville, Fla.Type.?U.S.^.U. No. 24522.
U. .?OVERNHENT PRINTlNS OrriCEil*4t