NAMES APPLIED TO BEES OF THE GENUS NOMADA,FOUND IN NORTH A^IERICA.^
By T. D. A. COCKERELL,Of the University of Colorado, Boulder.
Having recently had occasion to classify a large number of Nomadafor the United States National Museum, I have thought it useful topresent for publication a list of the names applied to the Americanspecies of this genus. The need for such a list is evident, none hav-ing appeared since that of Cresson, published in 1887, which includedonly 73 names.All the names are cited in alphabetical order, followed by the nameof the author and date of publication. Whenever known, the type-locality is given, and also the name of the collector of the type.References are also made to all the principal synoptic tables, whichare enumerated below, and referred to by number in the list.SUBGENERA AND SECTIONS.Gnathias Robertson, 1903. Species with an inner tooth on the mandibles; includesN. cuneata, ovata, bella, washingtoni, grayi, rhodomelas, etc.Cephen Robertson, 1903. Scape of male normal; front coxse of female with longpubescent spines.Tyjpe.?N. texana; also includes /eri'ttZa, etc.Centrias Robertson, 1903. Scape of male robust; front coxae of female with longpubescent spines.Type.?N. erigeronis.Phor Robertson, 1903,Type.?N. integra. Also includes iV. subgracilis.Heminomada Cockerell, 1902.Type.?N. obliterata.Micronomada Cockerell and Atkins, 1902. Species of the type of N. modesta.Xanthidium Robertson, 1903. Species of the type of N. luteola; includes N. civilis,citrina, dentarise, etc.Holonomada Robertson, 1903. N. superba and its allies; includes N. edwardsii,vinnula, vincta, affabilis, etc.
1 The asterisk (*) indicates that the species is in the collection of the United States National Museum.Specimens sent to the Museum by Prof. T. D. A. Coclierell labeled as cotypes are considered as paratypes,as Professor Coclierell uses the word "cotype" in the sense that the Museum uses the word "paratype."Of the 273 names in this list, representatives of 112 are in the Museum collection. The Museum collectioncontains types of 44 of the species and paratypes of 7 additional ones. The catalogue number of the typeor paratype, when in the United States National Museum, has been added after the other information.
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S. A. ROHWER. Proceedings U. S. National Museum, Vol. 41?No. 1852.94428??Proc.N.M.vol.41?11 15 225
226 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41.Nomadula Cockerell, 1903.Type.? iV. articulata (americana auctt.). Antennae of male peculiar. Includesalso N. martinella, scita, scitiformis, erythrochroa, and sophiarum.Melanomada Cockerell, 1903.Type.?N. grindelise. Male entirely black, female with red abdomen.I can not distinguish Cephen from Micronomada.TABLES.(1) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., pp. 70-75. (Dated December, 1904,but published early in February, 1905: Species of Rocky Mountains.)(2) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., p. 82. (Allies of N. pallidella.)(3) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., p. 84. (Allies of N. coloradensis .)(4) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 559-561. (Species of Cali-fornia.)(5) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 580-582. (Xanthidium andHolonomada .)(6) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 589. (Red species.)(7) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 591. {Centrias and Nomadula.)(8) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 593.(9) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 594-596. (Gnathias.)(10) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 608-610. (Micronomada andCentrias.)(11) Cockerell, Univ. of Colorado Studies, vol. 4 (1907), pp. 247-248.(12) Robertson, Canadian Entomologist, June, 1903, pp. 173-179.LIST OF SPECIES.
* acccpia Cresson, 1878. "Colorado, Kansas (Snow, male, Morrison, female)." Tab.l.adducta Cresson, 1878. Colorado (Morrison). Tab. 1.*affabilis Cresson, 1878. "New York; Illinois." Tab. 5, 12.* affabilis dallasensis Cockerell, 1911. Dallt^s, Texas (Crawford and Pratt). Subg.Holonomada.Type.?Cat. No. 13434, U.S.N.M.agynia Cockerell, 1905. Golden, Colorado, July (Gillette). Tab. 1.* albofasciata Smith, 1879. Canada. Tab. 1, 9.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 312. Subg. Gnathias.Distribution in U. S.; Proc. Acad. Nat. Sci. Phila., 1903, p. 602.alpha Cockerell, 1905. Fort Collins, Colorado, May 20 (Bishopp). Tab. 1.* americana Kirby, 1837. Hudson Bay.Confusion as to identity. See Trans. Amer. Ent. Soc, vol. 31, p. 310.amoena Cresson, 1863. Rock Island, Illinois.Viereck reports that the type is not in Philadelphia.* angelarum Cockerell, 1903. Los Angeles County, California (Coquillett). Tab. 4.Type.?Cat. No. 13158, U.S.N.M.annulata Smith, 1854. "North America" (Murchison).Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 311.antonita Cockerell, 1909. Antonito, Colorado.*aquilarum Cockerell, 1903. South Fork of Eagle Creek, New Mexico (Townsend).Tab. 1.Visits Erigeron in August.Type.?Cat. No. 13183, U.S.N.M.*arizonica Cockerell, 1911. Arizona (Carl F. Baker). Subgen. Xanthidium.Type.?Cat. No. 14024, U.S.N.M.armata Herrich-Schaepfer, 1839. Europe.Nova Scotia. Female with head and thorax black; anterior margin of clypeusferruginous; thorax marked with ferruginous; abdomen ferruginous, base black,second segment with an oval yellow spot on each side. Labrum of male armedwith a sharp tooth in the middle.
NO. 1852. BEES OF THE GENUS NOBIADA?COCKERELL. 227
*armatella Cockerell, 1903. Canada. Tab. 3.Type.?Cat. No. 13174, U.S.N.M.*articulata Smith, 1854. "North America" (Doubleday). Tab. 12. (As Centriasamericanus.)Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 312.This has been erroneously known as N. americana.*ashmeadi Cockerell, 1903. Los Angeles County, California (Coquillett). Tab. 4.Type.?Gat. No. 13173, U.S.N.M.astori Cockerell, 1903. Corvallis, Oregon, May and June (Cordley). Tab. 6.Possibly a variety of N. ultimu.atrofrontata Cockerell, 1903. S. California. Tab. 4.Allied to N. ultima,aztecormn Cockerell, 1903. Amecameca, Mexico, September (Barrett).Female about 11 mm.; black with bright yellow markings; tegulse bright ferru-ginous; legs black and red.banksi Cockerell, 1907. Glencarlyn, Virginia, October (N. Banks).'*belfragei Cresson, 1878. Texas (G. W. Belfrage).*belfragei xanthogaster Cockerell, 1911. Texas (G. W. Belfrage).Type.?Cat. No. 13427, U.S.N.M.*bella Cresson, 1863. Massachusetts; Connecticut. Tab. 1, 6, 9. Subg. Gnathias.Distribution; Proc. Acad. Nat. Sci. Phila., 1903, p. 601.*bella callura Cockerell, 1911. West Cliff, Colorado (Cockerell). Subg. Gnathias.Type.?Cat. No. 13437, U.S.N.M.*bethnnei Cockerell, 1903. Canada. Tab. 3.Table contrasting bethimei with armatella; Proc. Acad. Nat. Sci. Phila., 1903, p. 607.Type.?Cat. No. 13159, U.S.N.M.beulahensis Cockerell, 1903. Beulah, New Mexico, August (Cockerell). Tab. 1.Allied to N. intcrrupteUa.hifurcata Cockerell, 1903. S. California. Tab. 4.Allied to N. sayi.bisignata Say, 1824.Robertson (1898) stated that this could not be identified, as he knew three speciesagreeing with Say's description.6orea?is Zetterstedt, 1838. Europe.Description of specimen from Nova Scotia; Trans. Amer. Ent. Soc, vol. 31, p. 311.californix Cockerell, 1903. S. California. Tab. 4.Allied to N. erythraea.*carolinse Cockerell, 1903. North Carolina. Tab. 9.Very close to N. cuneata.ceanothi Cockerell, 1907. Glencarlyn, Virginia (N. Banks).Allied to N.florilega. Visits Ceanothus in June.citrina Cresson, 1878. California (Henry Edwards). Tab. 5.citrina rufula Cockerell, 1903. Grangeville, Idaho. Tab. 5.*civilis Cresson, 1878. Colorado (Ridings, Morrison). Tab. 1, 5.Female ; Entomologist, 1909, p. 93.civilis spokanensis Cockerell, 1910. Spokane, Washington (W. M. Mann). Subg.Xanthidium.clarkii Cockerell, 1903. Corvallis, Oregon, April 6 (Cordley). Tab. 6.*collinsiana Cockerell, 1905. Fort Collins, Colorado (S. A. Johnson). Tab. 1, 11.coloradella Cockerell, 1905. Fort Collins, Colorado. Tab. 1.coloradensis Cockerell, 1903. Montrose, Colorado (Gillette). Tab. 1, 3.Male, and history of type; Bull. 94, Colo. Agric. Exp. Sta., p. 84.*coquilletti Cockerell, 1903. Santa Clara County, California (Coquillett). Tab. 4.Resembles N. modocorum.Type.?Cat. No. 13186, U.S.N.M.
228 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41.
cordleyi Cockerell, 1903^ Corvallia, Oregon (Cordley).Male 7 mm.; abdomen subclavate.cornelliana Cockerell, 1908. Ithaca, New York (N. Banks).A Gnathias allied to N. physura.corvallisensis Cockerell, 1903. Corvallis, Oregon, May 24 (Cordley). Tab. 6.*crassuZa Cockerell, 1903. Louiaiana. Tab. 10.Resembles N. modesta.Type.?Cat. No. 13171, U.S.N.M.*craw/br(/i Cockerell, 1905. Virginia Dale, Colorado (Bishopp). Tab. 1.Male; Bull. Amer. Mus. Nat. Hist., vol. 22 (1906), p. 438.*cressonii Robertson, 1893. Illinois (Robertson). Tab. 12.cressonii trevoriana Cockerell, 1905. Olympia, Washington State (Kincaid).No subdiscal cuneate spot on fourth abdominal segment.*crotchn Cresson, 1878. Fort Tejon, California (Crotch).croicAw m'^n'or Cockerell, 1903. S.California. Tab. 4.*crttm Cockerell, 1903. LasCruces, New Mexico, August (Townsend). Tab. 1,8, 10.Closely allied to N. neomexicana.Female; Entomologist, 1907, p. 265.crudelis Cresson, 1878. Georgia (Morrison).
"This and grandis are our largest species" (Cresson, 1878).cubensis Cresson, 1865. Cuba (Gundlach).*cuneata Robertson, 1903. Illinois. Tab. 1, 9, 12.Distribution; Proc. Acad. Nat. Sci. Phila., 1903, pp. 601-602.cuneata decemnotata Robertson, 1903. Illinois. Tab. 12.*cuneata octonotata Robertson, 1903. Illinois. Tab. 12.*cuneata quadrisignata Robertson, 1903. Illinois. Tab. 12.cuneata sexnotata Robertson, 1903. Illinois. Tab. 12.*cttsimcma Cockerell, 1911. West Cliff, Colorado (T.D.A. Cockerell). Suhgen. Gnathias.Type.?Cat. No. 14023, U.S.N.M.*cymhalarise Cockerell, 1906. Near Lake George, Colorado, June 18 (Rohwer).Probable male (close to illinoiensis); Entomologist, Dec, 1907, p. 268.*dacotana Cockerell, 1903. Brookings, South Dakota. Tab. 1, 10, 11.Also in Colorado and Montana.davidsoni Cockerell, 1903. S. California. Tab. 4.decempunctata Cockerell, 1903. S. California. Tab. 4.*dentarix Robertson, 1903. Illinois (Robertson). Tab. 5, 12.*denticulata Robertson, 1902. Illinois (Robertson). Tab. 12.Formerly confused with N. articulata.depressa Cresson, 1863. Maine.Female with a depression on fifth dorsal abdominal segment.Table of species allied to depressa; Ent. News, July, 1908, p. 323.depressicauda Cockerell, 1908. Falls Church, Virginia (N. Banks).Group of N. depressa.dilucida Cresson, 1878. Colorado (Morrison). Tab. 1.ednse Cockerell, 1907. Boulder, Colorado, April 10 (Edna Baker).Superficially much like N. ornithica.*edwardsii Cresson, 1878. California (Henry Edwards). Tab. 4, 5.Resembles N. superba.edwardsii australior Cockerell, 1903. Los Angeles County, California (Coquillett).Tab. 4.*electa Cresson, 1863. Illinois; Connecticut.Female with sides of face, clypeus, labrum, mandibles, posterior orbits, and aminute spot on each side of ocelli, ferruginous tinged with yellowish; abdomenyellow-banded above, beneath piceous, immaculate. Male with clypeus, etc.,yellow.
NO. 1852. BEES OF THE OENUS NOMADA?COCKERELL. 229
electella Cockerell, 1903. Georgia.Anterior coxae of female spined.*elegantula Cockerell, 1903. Los Angeles County, California. Tab. 4.Also occurs at Lewiston, Idaho.Type.?Cat. No. 13180, U.S.N.M.elrodi Cockerell, 1903. Montana. Tab. 1, 5.Also in Nebraska.erigeronis Robertson, 1897. Illinois (Robertson). Tab. 7, 10, 12.West to Nebraska. See Proc. Acad. Nat. Sci. Phila., 1903, p. 588.*?rythrsea Dalla Torre, 1896. Tab. 4.*erythrochroa Cockerell, 1903. Pasco, Washington, May 25 (Kincaid).An orange-ferruginous species.Type.?Cat. No. 13165, U.S.N.M.*excellens Cockerell, 1903. S. California. Tab. 4.Variety from Nevada; Proc. Acad. Nat. Sci. Phila., 1903, p. 588.excurrens Cockerell, 1903. Southern California. Tab. 4.Very close to N. hemphilli.fervida Smith, 1854. "St. John's Bluff, East Florida; Georgia (E. Doubleday)."Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 310./estiva Cresson, 1863. New Jersey.Resembles N. modesta; abdomen with yellow bands.fiammigera Cockerell, 1906. North Yakima, Washington, May 15 (E. Jenne).Female with head and thorax red, with black markings and no yellow; abdomenwith a round cream-colored spot on each side of second segment; mandiblessimple.flaviceps Cresson, 1865. Cuba (Gundlach).flavipes Provancher, 1888. Los Angeles, California.Appears to be near N. formula,fiorilega Lovell and Cockerell, 1905.Female about 8 mm.; allied to N. sayi, but larger and darker, the metathoraxentirely black.Visits Aralia and Spirsea.fontis Cockerell, 1910. Steamboat Springs, Colorado (Cockerell). Subg. Nomadas. str.*formula Viereck, 1903. San Pedro, California (Cockerell). Tab. 4, 8, 10.Male; Cockerell, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 658.fowleri Cockerell, 1903. Corvallis, Oregon, April 15 (Cordley).Female black and ferruginous; the only yellow about the insect is a small patch atextreme lower corners of face.fragilis Cresson, 1878. Colorado (Ridings, Morrison). Tab. 1, 8, 11.*frieseana Cockerell, 1904. Prospect Lake, Colorado Springs, Colorado, May 22(T. and W. Cockerell).Resembles N. rubicunda.*garciana Cockerell, 1907. Mesilla Park, New Mexico, May 1 (Cockerell).Possibly a subspecies of N. snowi.gibbosa Viereck, 1905. Oregon.Thorax almost entirely black, including scutellum; abdomen with yellow spots; alittle yellow at lower corners of face.gillettei Cockerell, 1905. Golden, Colorado, July 3 (Gillette). Tab. 1.
^gracilis Cresson, 1863. Massachusetts.Notes on type; Entomologist, 1907, p. 98.grsenicheri Cockerell, 1905.A Xanthidium looking like N. modesta; visits Helianthus in August.grandis Cresson, 1875. Colorado (H. C. Yarrow). Tab. 1.
230 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41.grayi Cockerell, 1903. Corvallis, Oregon, May 7 (Cordley). Tab. 6, 9.*grayi eastonensis Cockerell, 1903. Easton, Washington. Tab. 9.Type.?Cat. No. 13163, U.S.N.M.*grindelise Cockerell, 1903. Lincoln, Nebraska, Sept. 2 (Crawford). Tab. 1.Male black; female with red abdomen.gutierrezix Cockerell, 1896. Mesilla Park, New Mexico (Cockerell). Tab. 1.Type.?C&i. No. 5322, U.S.N.M.heiligbrodtii Cresson, 1878. Texas (L. Heiligbrodt). Tab. 10.Allied to N. modesta.*heleniella Cockerell, 1911. Victoria, Texas (J. C. Crawford). Subg. Melanomada.Type.?Csit. No. 13431, U.S.N.M.hemphilli Cockerell, 1903. S. California. Tab. 4.hesperia Cockerell, 1903. S. California. Tab. 4.hoodiana Cockerell, 1903. Mount Hood, Oregon.illinoensis Robertson, 1900. Illinois (Robertson). Tab. 12.Was confused with N. sayi; abdomen of female nearly always 5- or 6- spotted,mfencato Smith, 1854. " United States.
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Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 310.Hncerta Cresson, 1863. "Conn., N. J., Pa., Md., Ills."Female abdomen ferruginous, immaculate.Same as N. articulata.infantula Cockerell, 1907. Great Falls, Virginia, May 22 (N. Banks).A very small species, about 5 mm. long.integerrima Dalla Torre, 1896.Apex of male abdomen entire,integrm Robertson, 1893. Illinois (Robertson). Tab. 12. {Phor integer.)Name preoccupied; =integerrima.intercepta Smith, 1879. Vancouver Island.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 312.interrupta Fowler, 1899. Berkeley, California (H. 0. Woodworth).Name preoccupied; =interruptella.interruptella Fowler, 1902.itamera Cockerell, 1910. Pullman, Washington (W. M. Mann). Subg. Nomada8. str.jennei Cockerell, 1906. N. Yakima, Washington, Sept. 26 (E. Jenne).Although the anterior coxae are not spined, they have minute red tubercles.Probably nearest to N. pascoensis, which is quite differently colored.jocularis Cresson, 1879. Nevada (Morrison).kincaidiana Cockerell, 1903. Washington.Jcrugii Cresson, 1878. Porto Rico (Leopold Ki'ug).lamarensis Cockerell, 1905. Lamar. Colorado. (E. D. Ball). Tab. 1.Hatifrons Cockerell, 1903. Santa Cruz Mountains, California. Tab. 4.Variety from Nevada; Proc. Acad. Nat. Sci. Phila., 1903, p. 588.Type.?C&t. No. 13155, U.S.N.M.Hehighensis Cockerell, 1903. Lehigh Gap, Pennsylvania. (Viereck).Paratype.?C&t. No. 13831, U.S.N.M.*lepida Cresson, 1863. Pikes Peak, Colorado; Rock Island, Illinois. Tab. 1, 9, 11.Subgenus Gnathias.New description; Proc. Acad. Nat. Sci. Phila., 1903, p. 596.Hewisi Cockerell, 1903. Corvallis, Oregon, May and June (Cordley). Tab. 6.Paratype.?Cat. No. 13188, U.S.N.M.*libata Cresson, 1878. Colorado (Ridings). Tab. 1.For characters see Cockerell, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 648.limata Cresson, 1878. Mexico (Sumichrast).Resembles the Cuban N. tibialis. Also in Texas.
NO. 1852. BEES OF THE GENU.^ NOMADA?COCKERELL. 231lippix CocKERELL, 1903. La Cueva, Organ Mountains, New Mexico (Townsend).Tab. 1, 8, 10.Visits Lippia in September.lippix sublippix Cockerell, 1907. Las Cruces, New Mexico, Sept. 15 (Cockerell).Male with clypeus black; nosupraclypeal mark; lateral face-marks narrower above.*louisian3e Cockerell, 1903. Louisiana. Tab. 9.Allied to iV. cuneata.Type.?Cut. "No. 13166, U.S.N.M.*luteola Olivier, 1811. Carolina. Tab. 5, 12.Huteola bishoppi Cockerell, 1911. Dallas, Texas (Bishopp). Subg. Xanthidium.Type.?Cat. No. 13435, U.S.N.M.*luteoloides Robertson, 1895. Illinois (Robertson). Tab. 5, 12.Allied to N. luteola.luteopicta Cockerell, 1905. Palisades, Colorado (Gillette). Tab. 1.*maculata Cresson, 1863. Connecticut.Female of N. bella.viagnifica Cockerell, 1903. Colorado. Tab. 1.Perhaps a variety of N. grandis.malonella Cockerell, 1910. Wawawai, Wash. (W. M. Mann). Subg. Nomada s. str.maZoTima Cockerell, 1910. Wawawai, Wash. (W. M. Mann). Subg. Nomada s. str.*marginella Cockerell, 1903. S. California. Tab. 4.*martinella Cockerell, 1903. Mesilla Park, New Mexico, April (Cockerell). Tab. 1,10, 11.Male; Bull. 94, Colorado Agric. Exper. Sta., p. 76. Also in Colorado.Type.?Cat. No. 13156, U.S.N.M.melliventris Cresson, 1878. California (Henry Edwards).*mera Cockerell, 1908. Salina, Colorado (W. P. Cockerell).Allied to N. cressonii; a variety occurs in New Jersey.mexicana Cresson, 1878. Mexico (Sumichrast).miviula Cockerell, 1908. Falls Church, Virginia (N. Banks).Resembles N. modesta.miniata Smith, 1854. Georgia.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 311.*mitchelli Cockerell, 1911. Victoria, Texas (J. D. Mitchell). Subg. Micronomada.Type.?Cat. No. 13433, U.S.N.M.*modesta Cresson, 1863. Maine; Rock Island, Illinois. Tab. 10.modesta rivertonensis Cockerell, 1903. Riverton, New Jersey (Viereck). Tab. 10.modocorum Cockerell, 1903. Corvallis, Oregon (Cordley).movtezumia Smith, 1879. Orizaba, Mexico.Notes on type; Trans. Am. Ent. Soc, vol. 31, p. 312.*morrisoni Cresson, 1878. Colorado (H. K. Morrison). Tab. 1, 5.*morrisoni flagellaris Cockerell, 1903. Colorado (Morrison). Tab. 1, 5.Type.?Cat. No. 13172, U.S.N.M.munda Cresson, 1878. Colorado (Ridings). Tab. 1.Female with clypeus and tegulae ferruginous.mutans Cockerell, 1910. Pullman, Washington (W. M. Mann). Subg. Holonomada.*neoviexicana Cockerell, 1903. Deming, New Mexico, July (Cockerell). Tab. 1,8, 10.Perhaps a subspecies of texana.Type.?Cat. No. 13157, U.S.N.M.nigrodncta Smith, 1879. Arctic America. Tab. 6.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 311.
232 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41.
ohliqua Fowler, 1899. Berkeley, California (H. 0. Woodworth).Name preoccupied; =obliquelia.ohliquella Fowler, 1902.*ohlit?rata Cresson, 1863. District of Columbia. Tab. 1, 12. (Beminomada obliterata.)obscura Fowler, 1899. Berkeley, California (Fowler).Name preoccupied; =obscurella.obscurella Fowler, 1902.opposita Cresson, 1878. California (Henry Edwards).orciisella Cockerell, 1910. Orcas Island, Washington (W. M. Mann). Subg. No'nada8. str.*oregonica Cockerell, 1903. Corvallis, Oregon, April to June (Cordley). Tab 4, 6.Ranges to S. California. Similar to N. sayi.Paratype.?Cat. No. 13191, U.S.N.M.ornithica Cockerell, 1906. Boulder, Colorado (W. P. Cockerell). Tab. 11.*osborni Cockerell, 1911. Tucson, Arizona (H. Osborn). Subgen. Nomada a. str.Type.?Cat. No. 14025, U.S.N.M.ovata Robertson, 1903. Illinois (Robertson). Tab. 9, 12.ovata binotata Robertson, 1903. Illinois. Tab. 12.ovata octomaculata Robertson, 1903. Illinois. Tab. 12.ovata plena Robertson, 1903. Illinois. Tab. 12.ovata quadrimaculata Robertson, 1903. Illinois. Tab. 12.ovata sexmaculata HoBE-RTSON, 190S. Illinois. Tab. 12.ovata imicolor Robertson, 1903. Illinois. Tab. 12.pacata Cresson, 1878. Colorado (Ridings).Same as N. accepta. See Ann. Mag. Nat. Hist., Oct., 1903. p. 447.packardiella Cockerell, 1906. Boulder, Colorado, June 11 (W. P. Cockerell). Tab. 11.Allied to N. nigrodncta.pallidella Cockerell, 1905. Montrose, Colorado (Gillette). Tab. 1, 2parata Cresson, 1878. Colorado (Ridings). Tab. 1.Allied to N. libata, but tegulse polished, with a few scattered punctures (in libatacoarsely sculptured and opaque).*parva Robertson, 1900. Illinois (Robertson). Tab. 12.Confused with N. sayi; female abdomen 8-spotted.*pascoensis Cockerell, 1903. Pasco,Washington State, May 25 (Kincaid). Tab. 4, 5.A variety occurs in Los Angeles County, California.Type.?Cat. No. 13187, U.S.N.M.*pecosmsis Cockerell, 1903. Pecos, New Mexico, June26 (W. P. Cockerell). Tab. 1, 5.Described as a.variety of N. xanthophila.Type.?Cat. No. 13185, U.S.N.M.pennigera Cockerell, 1894. Mesilla Valley, New Mexico. Tab. 1.*perbella Viereck, 1905. Corvallis, Oregon (Cordley). Subg. Gnathias.Closely related to N. bella. Also in British Columbia.Paratype.?Cat. No. 13330, U.S.N.M.perivincta Cockerell, 1905. Colorado. Tab. 1.*perivincta Cockerell, var. B. Cockerell, 1911. Colorado.perivincta semirufula Cockerell, 1905. Colorado. Tab. 1.*perplexa Cresson, 1863. "Mass., Conn., Pa., Del." Tab. 9. Subgenus Gnathias.perplexans Cockerell, 1910. Pullman, Washington (W. M. Mann), Subg. Gnathias.physura Cockerell, 1903. Nevada. Tab. 9.*pilosxda Cresson, 1878. New York.Belongs to the genus Viereckella.Plummers Island, Maryland, July 5, 1909 (J. C. Crawford).*placida Cresson, 1863. Pennsylvania. Tab. 12.*placitensis Cockerell, 1903. Placita, New Mexico, May (Cockerell). Tab. 1.Female about 10 mm.Type.?Cat. No. 13176, U.S.N.M.
NO. 1852. BEES OF THE GENUS NOMADA?COCKERELL. 233pTOi'anc/im DALLA Torre, 1896.proxima Cresson, 1863. Maine.Allied to N. vicina.pseudops CocKERELL, 1905. Milwaukee, Wisconsin (Graenicher).Female about 9 mm.; red, with black and yellow markings. Looks much likeN. coloradcnsis.pulchella Smith, 1854. "North America."*pulsatillie Cockerell, 1906. Boulder, Colorado, April 20 (Cockerell). Tab. 11.Female r?d and black, with no yellow anywhere.punctata^provancheri Dalla Torre.A Canadian species has been cited as punctata Fabricius, but there is no species ofthis name described by Fabricius; N. punctata Lepeletier is Algerian. Provan-cher says the scutellum has a spine on each side. Dalla Torre renames thisprovanchcri.putnami Cresson, 1876. Spring Lake, Utah (J. D. Putnam). Tab. 10.*pygmse.a Cresson, 1863. Connecticut.Male with clypeus, a spot above it, labrum, mandibles, and face narrowly on eachside of clypeus, yellow; orbits ferruginous. Viereck exammed Cresson's typeand found mandibles simple.rhodalis Cockerell, 1903. Nevada. Tab. 9.rhodomelas Cockerell, 1903. Corvallis, Oregon (Cordley). Tab. 9.*rhodosoma Cockerell, 1903. Santa Cruz Mountains, California. Tab. 4.Close to N. erythrsea. *Type.?C9it. No. 13167, U.S.N.M.*rhodosoma rhodosomella Cockerell, 1903. Colorado (Morrison).Type.?Cat. No. 13161, U.S.N.M.rhodotricha Cockerell, 1903. S. California. Tab. 4.Thorax with bright ferruginous hair.rhodoxantha Cockerell, 1905. Colorado.ridingsii Cresson, 1878. Colorado (J. Ridings). Tab. 1, 10.Allied to N. putnami.*nvalis Cresson, 1878. California (H. Edwards, Behrens). Tab. 5.For characters see Cockerell, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 651.rohertsonella Cockerell, 1903. Nevada.Resembles N. erythrxa.*rohwen Cockerell, 1906. Near Lake George, Colorado, June 18 (Rohwer).Allied to N. snowi.rubicunda Oliver, 1811. Carolina. Tab. 10.rubra Provancher, 1888. Los Angeles, California.Name preoccupied; =erythrxa.ruhrella Cockerell, 1905. Fort Collins, Colorado (Mrs. Laura Titus). Tab. 1.Subgenus Gnathias.*rubrica Provancher, 1896. Los Angeles, California (Coquillett). Tab. 4.Vai-iety: Proc. Acad. Nat. Sci. Phila., 1903, p. 570.*ruficornis Linne^us, 1758. Europe.Supposed ruficornis in Maryland; Proc. Acad. Nat. Sci. Phila., 1903, p. 614.*ruidosensis Cockerell, 1903. Ruidoso Creek, New Mexico (Wooton). Tab. 1.Variation: Bull. Amer. Mus. Nat. Hist., vol. 22 (1906), p. 438. Also in Colorado.Type.?Cat. No. 13175, U.S.N.M.salicis Robertson, 1900. Illinois (Robertson) Tab. 2, 12.*sanctsea-uds Cockerell, 1903. Santa Cruz Mountains, California. Tab. 4, 5.Type.?Cat. No. 13179, U.S.N.M.*sayi Robertson, 1893. Illinois. Tab. 1, 12.New description: Canad. Ent., 1900, p. 293.Distribution: Proc. Acad. Nat. Sci. Phila., 1903, p. 605.
234 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41.
*schwarz% Cockerell, 1903. Veta Pass, Colorado, June 28. Tab. 1, 9. Subg.Gnathias.Allied to N. bella and cuneata.Type.?Cat. No. 13164, U.S.N.M.*schivarzi contractula Cockerell, 1903. Beulah, New Mexico (Cockerell). Tab. 1, 9.Subg. Gnathias.Type.?Cat. No. 13134, U.S.N.M.*sdta Cresson, 1878. Colorado (Morrison). Tab. 7, 8, 10.Related to N. articulata.*scitiformis Cockerell, 1903. Corvallis, Oregon, June (Cordley). Tab. 7, 10.Paratype.?Cat. No. 13160, U.S.N.M.*semiscita Cockerell, 1904. Prospect Lake, Colorado Springs, Colorado, May 22(T. and W. Cockerell).Allied to N. scitiformis.*semisuavis Cockerell, 1910. Wawawi, Washington (W. M. Mann). Subg. Micro-noviada.Female: Cockerell, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 658. Also in California*sidsefloris Cockerell, 1898. Mesilla, New Mexico (Cockerell). Tab. 1.Described as a variety of N. pennigera.Type.?Cat. No. 5821, U.S.N.M.simplex Robertson, 1902. Illinois. Tab. 2, 12.In 1897 Robertson recorded this as the female of N. bella.skinneri Cockerell, 1908. Lehigh Gap, Pennsylvania, June 30 (Viereck).Group of N. depressa.*snowii Cresson, 1878. Colorado (F. II. Snow, Morrison). Tab. 1, 10.Female with clypeus ferruginous, lateral face-marks white.*sophiarum Cockerell, 1903. Mesilla Park, New Mexico, April 16 (Cockerell).Tab. 1, 8, 10.Type.?Cat. No. 13182, U.S.N.M.sphxrogasier Cockerell, 1903. Riverton, New Jersey, April (Viereck).*suavis Cresson, 1878. "California (Behrens); Oregon (H. Edwards)." Tab. 8.*subaccepta Cockerell, 1907. Florissant, Colorado (Rohwer). Subg. Gnathias.In Tab. 1 runs to N. vicinalis, but differs (male) by its smaller size, base ofmetathorax with distinct though delicate longitudinal ridges, absence of yellowon first abdominal segment, etc.Paratype.?Cat. No. 13667, U.S.N.M.*subangusta Cockerell, 1903. S. California. Tab. 4.Type.?Cat. No. 13163, U.S.N.M.subgracilis Cockerell, 1903. California. Tab. 4.Belongs to subgenus Phor.subrutila Lovell and Cockerell, 1905. Maine (Lovell). Tab. 11.Also in Colorado. See Ann. and Mag. Nat. Hist., July, 1906, p. 69.*subsiinilis Cockerell, 1903. Los Angeles County, California, Feb. (Coquillett).Tab. 4.Perhaps a subspecies of N. civilis.Type.?Cat. No. 13178, U.S.N.M.*subvicinalis Cockerell, 1903. S. California. Tab. 4.Type.?Cat. No. 13169, U.S.N.M.suda Cresson, 1879. Nevada (Morrison).sulphurata Smith, 1854. Georgia. Tab. 5.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 311.*supcrba Cresson, 1863. Pike's Peak, Colorado. Tab. 1, 12.*taraxacella Cockerell, 1903. Placita, New Mexico (Cockerell). Tab. 1.Allied to N. ultima.
NO. 1852. BEES OF THE GENUS NOMADA?COCKERELL. 235
*t?xana Cresson, 1872. Texas (Belfrage; Boll.) Tab. 10.Type.?Cat. No. 1762, U.S.N.M.tibialis Cresson, 1865. Cuba (Poey).tiftonensis Cockerell, 1903. Tifton, Georgia. Tab. 10.Allied to N. modesta.*tintinnabulum Cockerell, 1903. Santa Cruz Mountains, California. Tab. 4.Type.?Cat. No. 13177, U.S.N.M.torrida Smith, 1854. Georgia.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 310.truttanim Cockerell, 1909. Trout Spring, Galliuas Canyon, New Mexico, May(Cockerell).In Tab. 1 runs to N. vidnalis, from which it (male) differs by the large lateral face-marks, first abdominal segment without yellow, etc.uhleri Cockerell, 1905. Fort Collins, Colorado (Titus). Tab. 1.ultima Cockerell, 1903. Corvallis, Oregon (Cordley). Tab. 6.Also in California, at Palo Alto.iiUimella Cockerell, 1903. S. California. Tab. 4.Similar to N. erythrxa and N. ultima,xindulaticomis Cockerell, 1906. Boulder, Colorado, April 20 (W. P. Cockerell).Male in Tab. 1 runs to 62, but runs out because of the rather smaller size and redon scutellum.*valida Smith, 1854. Nova Scotia.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 310.vallesina Cockerell, 1906. Las Valles, New Mexico, April 20 (Cockerell).Female 82 mm. ; head, thorax, and legs bright ferruginous, without yellow, exceptthat the postscutellum is a sort of dull orange (black at extreme sides), but thereare black markings; abdomen with broad lemon-yellow bands. Visits wild plum.*vegana Cockerell, 1903. Las Vegas, New Mexico (A. Garlick). Tab. 1, 8, 10.Very close to N. modesta; clypeus of female ferruginous.vegana nitescrns Cockerell, 1905. Fort Collins, Colorado (Titus). Tab. 1.*verecunda Cresson, 1879. Nevada (Morrison). Tab. 8.
" Easily recognized by the black annulus on posterior tibiae and immaculate meta-thorax" (Cresson).wspi/ornw's FoRSTER, 1771. " North America ; Europe."A species not recognized by modern writers.*vexator Cockerell, 1909. Troublesome, Colorado, June (Rohwer).Paratype.?Cat. No. 12285, U.S.N.M.viburni Robertson, 1897. Illinois (Robertson).Only two submarginal cells.Same as N. obliterata.*vici7ia Cresson, 1863. "Connecticut; New York."vicinalis Cresson, 1878. Colorado (Morrison). Tab. 1, 3.Related to N. civilis.vicinalis aldrichi Cockerell, 1910. Moscow, Idaho.vicinalis infrarubens Cockerell, 1905. Corvallis, Oregon (Cordley). Tab. 3.*victrix Cockerell, 1911. Victoria, Texas (A. J. Leister). Has only two submargi-nal cells.Type.?Cat. No. 13436, U.S.N.M.*vierecki Cockerell, 1903. Juarez, Mexico, May 12 (Cockerell). Tab. 1, 8, 10.Also in Mesilla Valley, New Mexico.Type.?Cat. No. 13162, U.S.N.M.*vincta Say, 1837. Indiana (Say). Tab. 1, 5, 12.vinnula Cresson, 1879. Nevada (Morrison).
236 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41?'
viticollis Cresson, 1878. Mexico (Sumichrast).Female mesothorax black, with four longitutinal yellow lines.volatilis Smith, 1879. Canada.Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 312. Subg. Gnathias.washingtoni Cockerell, 1903. Washington State. Tab. 9.*wheeleri Cockerell, 1903. Texas (Belfrage). Tab. 10.Type.?Cat. No. 13170, U.S.N.M.*wheeleri engelmannise Cockerell, 1911. Dallas, Texas (W. S. Pierce).Also in Kansas.Type.?Cat. No. 13432, U.S.N.M.wootonella Cockerell, 1909. Mesilla Park, New Mexico (Cockerell).Visits Sophia in April. Allied to N. sayi.*xaniholepis Cockerell, 1911. Los Pinos, Colorado (Carl F. Baker).Type.?Cat. No. 14022, U.S.N.M.xanthophila Cockerell, 1900. Las Vegas, New Mexico (W. Porter). Tab. 1.Resembles N. superba.xanthura Cockerell, 1908. Sea Cliff, Long Island, New York (N. Banks).Allied to N. denticulata.*zehrata Cresson, 1878. "Colorado; Kansas (Ridings)." Tab. 1, 5."The male of this species is readily distinguished by the short dilated scape"(Cresson).ADDITIONAL NOTES ON BEES OF THE GENUS NOMADA.[The material discussed below is in the U. S. National Museum.]SPECIES FROM COLORADO.NOMADA (XANTHIDIUM) PERIVINCTA Cockerell, var. b.Female.?Length fully 11 mm.; first abdominal segment broad;mandibles yellow, piceous at apex; clypeus all yellow; posterior orbi-tal margins largely yellow; third and fourth antennal joints the samelight red, third much shorter than fourth; black disk of mesothoraxwith two broad red bands; scutellum strongly bilobed; patch onlower part of pleura all red; legs with much yellow, the general effectbeing yellow flushed with red, the hind femora and tibiae largely blackbehind; tegulse yellow, suffused with red posteriorly; apices of firstfour abdominal segments with reddish-black bands; first ventral seg-ment red, with a trilobed yellow mark; bases of third to fifth segmentsrufopiceous; third s. m. very broad below, greatly narrowed above;b. n. going a little basad of t. m. Differs from N. sulpJiurata Smith byhaving third antennal joint the same color as fourth; stripes on diskof mesothorax red and broad (yellow and narrow in sulphurata) ; andthe greater amount of yellow on abdomen. Differs from N. citrinaCresson by the absence of black on the anterior and middle legs(though the middle tibiae have a fuscous patch behind), and thelarge amount of red on legs; the square face; etc. iOne from the Baker collection, labeled " Colo. 2075." N. perivinctawas based on a single specimen in the collection of the Colorado Agri-cultural College, simply marked "Colorado." Another specimen inthe same collection, also marked "Colorado," differed so much that
NO. 1852. BEES OF THE GENUS NOMADA?COCKERELL. 237it was described as a variety semirufula. The present insect repre-sents another variety, more approaching N. sulphurata, but it doesnot seem worth while to give it a special name. It seems that sul-phurata of the Eastern States, perivincta of the Rocky Mountains, andcitrina of the California region are very closely allied, and possiblyonly subspecifically distinct. They are all confusingly variable.NOMADA ACCEPTA Cresson.A male in Baker's collection labeled "Colo. 1160" was markedaccepta by Baker, but someone crossed this out. It differs fromCresson's description of male accepta as follows: Upper half of la-brum and base of mandibles broadly, cream-color; tubercles with alarge cream-colored spot; pleural patch red with a large transversecream-colored mark. I possess only the female of N. accepta, butafter careful comparisons I feel assured that the male is correctlyreferred to it, the various differences noted being due to variation.In my table of Rocky Mountain Nomada ^ this runs to the same placeas the female. The mesothorax and metathorax are entirely black.NOMADA (MICRONOMADA) VEGANA Cockerell.Six from the Baker collection from Colorado, with numbers 1591,2325, 2096, 2098, 1081. NOMADA CIVILIS Cresson.A male from West Cliff, Colorado (Cockerell); marked fragilis byAshmead, and recorded as such.^NOMADA FRAGILIS Cresson.Several males from Fort Collins, Colorado, 1905, collector unknown;one from Baker, labeled "Colo. 2212."NOMADA (NOMADULA) ARTICULATA DACOTANA Cockerell.Males; Colorado (Baker 2076); Denver, Colorado, May 23, 1898(collector not given).NOMADA (NOMADULA) MARTINELLA Cockerell.Male: Berkeley, Colorado, May 18, 1898 (collector unknown).NOMADA (NOMADULA) FRIESEANA Cockerell.Male.?Length 10 mm.; superficially like N. articulata dacotana,with the same red, yellow-banded abdomen, but the light band onfirst segment with a spot on each side, and the apical plate entire; itis easily distinguised by the antennas, which are thick, with the fourthjoint much shorter, the fifth with a prominent sharp spine; the tegulse
1 Bull. 94, Colorado Agric. Exper. Station. s Trans. Amer. Ent. Soc, vol. 20, p. 339.
238 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41.are yellow. Compared with N. semiscita this is larger and morerobust, with the ground-color of the first three abdominal segmentsbright ferruginous, the postscutellum yellow or orange, and veryobscure light spots on the axillse and near the posterior corners of thescutellum. The first r. n. joins the second s. m. in the middle, andthe eyes are olive-green. Venter of abdomen clear ferruginous, spar-ingly marked with yellowish; lateral face-marks rather irregular, butgradually narrowing above, to end in a line which nearly reaches thetop of the eye; hind femora blackened behind, but in front only atbase.Berkeley, Colorado, June 10, 1897 (collector unknown). I wasabout to describe this as new, but on close comparison with N.frieseanafemale, I am convinced that it is the hitherto unknown male of thatspecies. NOMADA TEXANA Cresson.Two females: Colorado (Baker 2095). The yellow markings arepaler than usual. NOMADA TARAXACELLA Cockerell.Four females: Colorado (Baker 2075). One is quite normal, exceptthat the face is broad; the other three lack the yellow markings atthe sides of the abdomen, and the lower corners of the face, though alittle pallid, are scarcely yellow. After careful comparison, I amconvinced that they are all one species. Eight males, also withBaker's No. 2075, are, I think, certainly to be associated with them.These males, however, can not be easily separated from N. modocorumCockerell. N. taraxacella was originally described as a subspecies ofN. ultima Cockerell. The types of N. ultima and modocorum bothcame from Corvallis, Oregon, and I now believe they are the sexes ofone species. The Rocky Mountain taraxacella is readily separable inthe female, but the male is like that of modocorum, except that thehair on inner side of hind basitarsus is pale fulvous, and the thirdantennal joint is relatively shorter. The yellow bands along sides offace may be swollen at the upper end. The scutellum varies as follows
:
(1) All black, (2) with two minute red spots, (3) with two large redspots, slightly confluent, (4) with two small yellow spots.Two female taraxacella are labeled "Colo. 2179," from the Bakercollection. NOMADA SAYI Robertson.Females: Colorado (Baker 1893); Westcliffe, Colorado, at flowersof Erigeron radicatus, May 24, 1889 (T. D. A., Cockerell, 34). Thelast was reported in the Wet Mountain Valley list as N. americanavar. valida. These are best distinguished from N. taraxacella bythe smooth shining abdomen, without the satiny, almost purplish
NO. 1852. BEES OF THE GENU8 NOMADA^COCKERELL. 239luster of taraxacella, and the longer third antennal joint. The RockyMountain sayi is not quite typical; it ma}^ prove to grade into thePacific coast N. oregonica Cockerell.NOMADA MERA Cockerell.TNvo females (Baker 2075 and 2212) and one male (Baker 2075)from Colorado. The male, which has not been described, has thefollowing characters: Length about 8 mm.; head and thorax withmuch white silky hair; clypeus, supraclypeal mark (broader thanlong), lateral face-marks (filling space between clypeus and eye,except a dark stripe along sides of upper part of clypeus, narrowingabove antennae, and passing into a red band which reaches top ofeye), labrum, mandibles (except the ferruginous apical part), andfront of the thick scape, all paZe yellow; flagellum bright ferruginous,the basal half black above; third antennal joint about half as long asfourth ; mesothorax dark red with a broad median black band, and blacklateral margins; scutellum nearly all bright red; sides of metathoraxwith much white hair; metathorax all black; pleura with a smallobscure red spot ; tubercles yellowish red ; upper border of prothoraxred; tegulae light yellowish testaceous; legs bright ferruginous, with-out yellow; hind femora strongly blackened beneath; hind basitarsuswith a dark streak; abdomen colored and marked practically as infemale; apical plate strongly notched. In Robertson's table ^ thisruns nearest to N. cresonii Robertson. The female is easUy separatedfrom N. cymhalarise Cockerell by the abundant white hair at the sidesof the metathorax.Female N. mera was also taken at Boulder Falls, Boulder County,Colorado, May 23, 1908 (Hite).NOMADA CRAWFORDI Cockerell.Berkeley, Colorado, female, June 10, 1897 (collector unknown) . In1907 Mr. S. A. Rohwer took this species at flowers of Antennariamicrophylla, Florissant, Colorado, June 15, two males; and at flowersof Drymocallis fissa, Topaz Butte, Colorado, June 23.NOMADA XANTHOLEPIS, new species.Male.?Length IH mm. or rather more, anterior wing nearly 9mm.; black and yellow, the legs red and yellow, pubescence a rathersordid white; head broad, facial quadrangle broader than long; eyespale greenish-gray; labrum, mandibles except apex, sides of face,clypeus and nearly square supraclypeal mark, all bright yellow; asmall dark spot on each side of clypeus, contiguous with a round spotbeyond the suture; a black band along each side of supraclypeal markand upper part of clypeus, the broad lateral areas otherwise all j^ellow,
1 Canadian Entomologist, June, 1903.
240 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41.the yellow ending in a point, away from the orbit, a short distanceabove the antennae; lower half of posterior orbital margins broadlyyellow; scape thick, very broadly yellow in front; flagellum long(reaching postscutellum) and thick but normal, black above exceptat apex, broadly bright ferruginous beneath; third antennal jointmuch shorter than fourth; mesothorax black, densely and coarselypunctured ; metathorax all black ; upper border of prothorax, tuberclesand coarsely punctured tegulas, bright yellow; scutellum bigibbous,with two very large contiguous round patches, ferruginous suffusedwith yellow; postscutellum with a short band of the same color;pleura with a broad angular (rather L-shaped) yellow patch in front,a reddish-yellow spot near the middle of the upper part, and a smallspot near the lower end posteriorly ; legs red marked with yellow, andwith the anterior tibise in front, and the outer side of the hind basi-tarsi, all yellow; wings strongly yellowish, dusky at apex; b. n. alittle basad of t. m.; second s. m. broad below, receiving first r. n.about middle; stigma and nervures clear ferruginous; abdomenbroad, bright yellow, basal half of first segment black, and a triangu-lar red lobe projecting from the black in the middle, reaching themiddle of the yellow band; hind margins of segments reddish sub-hyaline, and extreme bases black; apical plate large, shallowly emar-ginate; venter yellow, only the basal part darkened.Habitat.?Los Pinos, Colorado, at flowers of Erigeron, May 22, 1899(Carl F. Baker).Type.?Csit. No. 14022, U.S.N.M.In my table of Rocky Mountain Nomada this runs to 47, differingfrom N. superba by the notched apical plate. The following tablebrings out its relationships with the species running to the samepoint in the 1903 table:Large and robust; metathorax with an obtuse projecting angle on each side; post-scutellum all black; hind margins of abdominal segments black (male).superba Cresson.Smaller; metathorax without such angles 22. Outer nervures dark fuscous; first r. n. joining second s. m. far beyond middle;scutellum with large yellow spots; postscutellum with a yellow band; hindmargins of first four abdominal segments black (female) viimula Cockerell.Outer nervures ferruginous or light brown: first r. n. usually joining second s. m.about middle (beyond in crawfordi) 33. Legs red, strongly marked with yellow; postscutellum with a light mark; lateralface-marks very broad above xantholepis Cockerell.Legs red, not or hardly at all marked with yellow; postscutellum all black 44. Lateral face-marks broad above crawfordi Cockerell.Lateral face-marks narrow above ednae Cockerell.N. xantholepis is a typical member of the subgenus XantTiidiumRobertson. Superficially, it looks very much like N. civilis Cresson.In the table ^ it runs out next to N. sandxcrucis Cockerell.
? Proc. Acad. Nat. Sci. Phila., 1903, p. 580,
NO. 1852. BEES OF THE GENUS NOMADA?COCEERELL. 241NOMADA (GNATHIAS) BELLA Cresson.Females: Bear Creek, Colorado, July 7, 1897 (collector unknown);Colorado (Baker 884).NOMADA (GNATHIAS) CUSTERIANA, new species.Male.?Length a little over 6 mm. ; head and thorax black, rugoso-punctate, with long white hair, dense and silvery on face; head trans-versely oval; eyes pale greenish-grey, their distance below at leastas great as the length of an eye; mandibles ferruginous, stronglybidentate at end; the Hnear malar space also ferruginous, but tegu-ment of labrum, clypeus, and all the rest of head entirely black; an-tennae reaching base of metathorax; scape black; flagellum brightferruginous, the upper surface black above and fiattish on the basalhalf, on the apical half not quite so dark, though strongly infuscated;third antennal joint much shorter than fourth, fourth about as longas last; thorax entirely black; tegulje large, punctured, rufopiceous;stigma and nervures ferruginous; b. n. going only a very little basadof t. m. (unusual venation for a Gnathias) ; second s. m. broad, receiv-ing first r. n. about middle; third s. m. extremely broad, but nar-rowed to about a fifth of its length above; legs black basally, withthe knees broadly, the tibise and tarsi chestnut red; anterior and mid-dle tibise with a dusky suffused patch on outer side; abdomen darkred. The first segment black at base, the black gradually meltinginto the red; segments 2 to 6 with cream-colored bands, on 2 verybroad, interrupted by red in middle, on 3 narrower, also interruptedby red, on 4 with a linear median interruption, but a very broad oneon each side, on 5 and 6 continuous in the middle, but failing laterally;apical plate long, notched; venter chestnut red, nude, except for alarge apical tuft of hair.Hahitat.?West Cliff, Colorado (T. D. A. Cockerell). Labeled byDoctor Ashmead Nomada pacata Cresson, a species to which it is notallied, although the markings of the abdomen are very like those ofpacata. Among the small species of Gnathias it will be readily knownby its wholly dark face and the venation.Type.?Cat. No. 14023, U.S.N.M.In the Transactions of the American Entomological Society,*N. parata Cresson is recorded from West Chff, but not pacata. I ampractically certain that N. custeriana is one of the specimens cap-tured May 19, 1889, of which I have a note that the size was smalland the thorax black. This was determined at the time by DoctorAshmead as N. parata, and was the basis of the record just cited.The specimens labeled ''West Cliff, Col." in the U. S. NationalMuseum, from the Ashmead collection, are all of my collecting,though this is not stated on the labels. So far as the aculeate Hymen-iVol. 20, p. 339.94428??Proc.N.M.vol.41?11 16
242 PROCEEDINGS OF THE NATIONAL MUSEUAI. vol. 41.optera are concerned, I fear the Wet Mountain Valley list in theTransactions of the American Entomological Society^ must be con-sidered very unreUable, but the records can be checked with the speci-mens in the National Museum.SPECIES FROM ARIZONA.NOMADA TEXANA Cresson.Eight males and three females from the Baker collection, labeledArizona, with Nos. 2122 and 2123.NOMADA (XANTHIDIUM) ARIZONICA, new species.Male.?Length 9 mm. or rather more; yellow, black, and red, withscanty white pubescence; eyes pale green; facial quadrangle aboutsquare; face below antennae all lemon yellow, except that it is slightlysuffused with red above, and there is a dusky band down each side ofsupraclypeal area and halfway down margin of clypeus; lateral face-marks ending broadly but suffusedly a little above level of antennae;a pale red posterior orbital band, extending over top of eye, its lower-most part changing to yellow; labrum yellow; mandibles yellow atbase, red in middle, dark at apex; scape stout, bright yellow, with ablack band behind; flagellum blackened above, except the first joint,beneath clear ferruginous, with the last three joints dusky; thirdantennal joint hardly over half length of fourth; mesothorax denselyrugosopunctate, black with red lateral suffusion and sublateral bands,the axillae also red; scutellum and postscutellum bright yellow; upperborder of prothorax and tubercles yellow; pleura with a very broadyellow band, having an upward broad extension in front; above andbelow this band it is red, but black just below the wings; metathoraxbroadly black in middle, with a broad red band on each side, invad-ing inclosure, and having on its lower part a large yellow spot; tegulsebright ferruginous; Avings clear hyaline, dusky at apex and in mar-ginal cell; stigma ferruginous, nervures rather light brown; b. n,meeting t. m. ; first r. n. joining second s. m. a little beyond middle;third s. m. very broad below; legs bright ferruginous, with the apicalhalf of anterior femora below, their tibiae in front, spots on coxae and.trochanters, middle and hind femora at apex, yellow, hind femoraand tibiae strongly blackened behind; outer side of hind tibiae tuber-culate; abdomen not very broad, bright yellow with the hind mar-gins of the segments reddish, and the extreme bases, as far as thefifth, black; the base of the second is black margined with red, andwith a yellow streak on each side at extreme base; first segment con-spicuously narrower than second, red at extreme base, then with abroad black band, edged posteriorly with red, then with an irregularbut not broken yellow band, with a posterior subdorsal red emargina-tion on each side, the broad hind margin of the segment dusky, very
J Vol. 20.
NO. 1852. BEES OF THE GENUS NOMADA?COCEERELL. 243finel}" pubescent; apical plate strongly notched; venter yellow, withbroad black bands at bases of second and fourth segments.Habitat.?Arizona, from the Baker collection, wi?h No. 1856.Type.?Cat. No. 14024, U.S.N.M.Distinguished among male Xanthidium by the red markings on themesothorax. In the table of Rocky Mountain species it runs to N.perivincta Cockerell, the male of which is unknown, but from analogywith other species it is practically certain that it is not the male ofperivincta. There is evident relationship with N. elrodi Cockerell, butthat species differs by the broader face, black postscutellum, etc.NOMADA OSBORNI, new species.Male.?Length, about 6 mm. ; head and thorax black, quite denselyclothed with entirely white hair ; mesothorax with large strong punc-tures, the shining surface between them conspicuous on the disk;scutellum very flat; eyes pale olive-green; facial quadrangle longerthan broad; face densely covered wdth white hair; mandibles simple,yellow with the apical part ferruginous; broad band beneath eyes,labrum, lower half of cl^^peus (\vith an upwardl}^ directed angle inmiddle), and narrow lateral face-marks (ending in a very sharp pointat about level of antennae), all yellow; scape not much swollen,broadly yellow in front; flagellum bright ferruginous, nearly thebasal half infuscated above; third antennal joint conspicuously shorterthan fourth; tubercles and a small mark on lower part of pleura,almost hidden by hair, yellow, thorax otherwise black; tegulae paleyellowish with a darker spot; wings a little smoky, darker at apex;stigma dark ferruginous, nervures fuscous; b. n. going just basad oft. m.; second s. m. receiving first r. n. in middle; third s. m. nearly asbroad above as second ; anterior legs light ferruginous, the tibise darkbehmd, and yellowish apically in front; middle and hind legs darker,strongly infuscated behind, the knees and apices of tibiae yellow; hindtibise with much white hair behind; abdomen long and tapering,broadest at second segment, bright chestnut red, with very obscuresmall yellowish spots at sides of second and third segments; a broadyellow band on sixth segment, not reaching sides ; first segment darkat base, and dusky on apical margin; broad apical margins of segmentsvery thinly clothed with white hair; apical plate notched; venterred, the first segment with a cordiform black mark, at the end ofwhich is a patch of white hair; apical ventral tuft of white hair small.Habitat.?Tucson, Arizona (H. Osborn)
.
Type.?Cat. No. 14025, U.S.N.M.A Nomada s. str., related to N. vexator Cockerell, but smaller, withdifferently colored tegulas, the darker abdomen with much less yellow,etc. In the table of Rocky Mountain Nomada it runs to 66, and goeswith N. vexator in a new division. The dorsum of thorax shiningbetween the punctures, and the flattened scutellum, are highlydistinctive.