SMITHSONIAN MISCELLANEOUS COLLECTIONSVOLUME 68, NUMBER 4
PRELIMINARY DIAGNOSES OE NEW MAMMALS OBTAINEDBY THE YALE-NATIONAL GEOGRAPHIC SOCIETYPERUVIAN EXPEDITION
BYOLDFIELD THOMASBritish Museum
(Publication 2447)
CITY OF WASHINGTONPUBLISHED BY THE SMITHSONIAN INSTITUTIONAPRIL 10, 1917
ZU JSorb <§aitimou (pree«fBALTIMORE, MD., V. S. A.
PRELIMINARY DIAGNOSES OF NEW MAMMALSOBTAINED BY THE YALE-NATIONALGEOGRAPHIC SOCIETY PERU-VIAN EXPEDITIONBv OLDFIELD THOMAS. British MuseumBy arrangement with the authorities of the Yale-National Geo-graphic Society Peruvian Expedition the United States NationalMuseum has submitted to me for working" out the very fine collec-tion of mammals made by Mr. lulmund Heller during the year 191 5.This material was obtained at localities lying between Lat. 12° 30'and 13° 30' S., Long. 'J2° and 73° W., in the region of Cuzco, Peru.The following" are i)reliminary diagnoses of the new forms. A fullaccount of the collection will be published in due course.
. MICRORYZOMYS, subg. nov. of ORYZOMYSTeeth very small. Zygomatic plate not projected forwards.Genotype.—Or\zo)n\s iiiiiiittiis Tomes.ORYZOMYS (MICRORYZOMYS) AURILLUS, sp. nov.Near Oryconiys dryas, but color duller and ears longer.Head and body of type 83 mm. ; tail 134; hindfoot 22.5 ; ear 15.5.Skull, greatest length 23.5.Habitat.—Torontoy.Type.—Female. U. S. Nat. Mus. No. 194795 ; original number 255.HESPEROMYS FRIDA, sp. nov.Large, with comparatively long tail. Supraorbital ridges littledivergent.Head and body of type 102 mm.; tail 91 ; hindfoot 19; ear 18.Skull, greatest length 26.7.Habitat.—Chospyoc, 10,000 feet.Type.—Female. U. S. Nat. Mus. No. 194779; original number 96.HESPEROMYS CARILLUS MARCARUM, subsp. nov.Duller colored than true carillus; tail white above; soles morehairy. Smithsonian Miscellaneous Collections, Vol. 68, No. 4
2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 68Head and body 82 mm.; tail 46; hindfoot 17.7. Upper molarseries 3.7.Habitat.—Lauramarca.Type.—Brit Mus. No. 3. 2. 9. 8. Coll. O. Garlepp.THOMASOMYS NOTATUS, sp. nov.Size medium. Dark dorsal stripe present. Metatarsus with darkpatches.Head and body 128 mm.; tail 155; hindfoot 27; ear 18.5. Skullgreatest length 33.Habitat.—Torontoy, 9,500 feet.Type.—Male. U. S. Nat. Mus. No. 194548; original number 173.THOMASOMYS GRACILIS, sp. nov.Similar to Thoniasouiys ba^ops but smaller ; about the smallest ofthe genus.Head and body 82 mm.; tail 120; hindfoot 21.5; ear 16. Skull,greatest length 26.1.Habitat.—Matchu Picchu, 12,000 feet.Type.—Male. U. S. Nat. Mus. No. 194816; original number 321.THOMASOMYS DAPHNE, sp. nov.Size small ; ears short. Incisors unusually thrown forward.Head and body 92 mm.; tail 133; hindfoot 23.5; ear 16. Skull,greatest length 27.7.Habitat.—Ocobamba Valley, 9,100 feet.Type.—Female. U. S. Nat. Mus. No. 194902 ; original number 521.AKODON SURDUS, sp. nov.Allied to Akodon mollis but more stoutly built, and darker in color,without tinge of bufify.Head and body no mm.; tail 80; hindfoot 22.5; ear 16. Skull,greatest length 28.Habitat.—Huadquifia, 5,000 feet.Type.—Male. U. S. Nat. Mus. No. 194663 ; original number 835.CHR(EOMYS INORNATUS, sp. nov.Near Chrocomys pulcherrimns, but ears smaller and bullae andspecial markings reduced.Head and body 122 mm.; tail 80; hindfoot 24.5; ear 16. Skull,greatest length 30.Habitat.—Ollantaytambo, 13,000 feet.Type.—Female. U. S. Nat. Mus. No. 194685 ; original number 457.
NO. 4 NEW MAMMALS FROM PERU THQMAS 3MICROXUS TORQUES, sp. nov.Near Microxns mimus, but the zygomatic plate broader.Head and body 102 mm.; tail 94; hindfoot 22.3; ear 17. Skull,greatest length 28.Habitat.—Matchu Picchu, 10,000 feet.Type.—Male. U. S. Nat. Mus. No. 194607 ; original number 276.LAMA VICUGNA MENSALIS, subsp. nov.Size slightly less than in true vicugna and teeth much smaller.Color more strongly fulvous.Greatest length of skull 240 mm. ; length of molars 45.Habitat.—Peru and Bolivia ; type from Incapirra, Junin, Peru,17,700 feet.Type.—Male. Brit. Mus. No. 97. 10. 3. 18. Coll. J. Kalinowski.OROLESTES, gen. nov. (C(ENOLESTID.ffi)Like Coonolestes, but with various differences in dentition, of whichthe most noticeable is that the canine is short, double-rooted, andshaped like a premolar.Genotype.—Orolestes inca, new species.OROLESTES INCA, sp. nov.Dark brown above, rather paler below. Size and general appear-ance about as in Cccnolestes fiiliginosus.Head and body 120 mm. ; tail 108 ; hindfoot 22 ; ear 15. Greatestlength of skull 33.Habitat.—Torontoy, 14,000 feet.Type.—Male. U. S. Nat. Mus. No. 194401 ; original number 248.