Vol. XXVI, pp. 129-134 May 21, 1913 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TEN NEW MAMMALS FROM NEW MEXICO. 

 BY VERNON BAILEY, 



t". S. Biological Survej . 



In working out the ranges of mammals in New Mexico I find 

 a number of forms that require specific or subspecifie names. 

 They include two chipmunks, three ground-squirrels, a jump- 

 ing mouse, a cottonrat, a red-hacked mouse, a cony and a 

 shrew. The types are all in the Biological Survey collection in 

 the U. S. National Museum. 



Hutamias atristriatus sp. nov. 



Typt from the Sacramento Mountains, New Mexico, on Penasco Creek 

 ll' miles east of Cloudcroft, alt, 7400 feet. No. 1 L9,028, 9 ad., U. S. Na- 

 tional Museum, Biological Survey Collection. Collected by Vernon Bailey, 

 September 6, 1902. Original number, 7953. 



General characters. — in size and general appearance nearest toE. oper- 

 arius but slightly larger, duller and darker colored, and with longer, 

 narrower skull. 



Color. —In post-breeding or full summer pelage (Sept. and 7), back 

 with five broad black stripes, two rusty gray and two buffy-whitish 

 stripes: sides duller and more grayish fulvous, and belly more yellowish 

 than in operarius, quadrivittatus or canipes in the same pelage. Young 

 of the year with the same excess of black above; sides dull and bellies 

 yellowish as in adults. 



Skull. — Longer and narrower than in operarius, smaller and relatively 

 narrower than in quadrivittatus, much smaller than in canipes. 



Measurements.— Type, 9 ad.: Total length, 220; tail vertebrae, 114; 

 hind foot, 32. Average of three adult topotypes, 210; 95; 32. Skull of 

 type: greatest length, 33.8; basal length, 28.5; nasals, 9.6; greatest 

 zygomatic breadth, IS; mastoid breadth, 10; width of braincase, 15; 

 alveolar length of upper molar series, 5. 



Specimens examined. — Ten, all from the east slope of the Sacramento 

 Mountains, New Mexico, where Hollister and I collected them along 



32— Proc. Biol. Soc. Wash., Vol. XXVI, 1913. (129) 



