Vol. 30, pp. 105-106 May 23, 1917 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW RACE OF SAY'S GROUND 

 SQUIRREL FROM WYOMING. 



BY ARTHUR H. HOWELL. 



A study of the Wyoming specimens of the genus Callosper- 

 mophilus in the Biological Survey collection for the purpose of 

 mapping the ranges of the several forms shows that an unrec- 

 ognized race occupies the Wind River and Gros Ventre ranges, 

 with their foothills. It is here named for Mr. Merritt Cary, of 

 Neligh, Nebraska, in recognition of his work on the Wyoming 

 fauna. 



Callospermophilus lateralis caryi, subsp. nov. 



Type, Adult female, skin and skull, No. 176,826, U. S. National Mu- 

 seum (Biological Survey Collection), from 7 miles south of Fremont Peak, 

 Wind River Mountains, Wyoming (altitude 10,400 feet); collected July 

 19, 1911, by Merritt Cary; original number, 2211. 



General characters. —Similar to C. I. castanurus, but upperparts (in 

 spring pelage) decidedly grayer (less vinaceous); dorsal stripes clearer 

 white; head, mantle, and rump paler; under surface of tail much paler. 

 Compared with cinerascens : Under side of tail darker (clear pinkish cin- 

 namon or tawny unmixed with black); mantle paler; skull decidedly 

 smaller. Compared with lateralis: Upperparts grayer; dorsal stripes 

 more distinct, the black and white stripes strongly contrasted ; sides and 

 underparts clearer white; under side of tail darker. 



Color. — Worn winter pelage : Upperparts smoke gray more or less 

 mixed, especially on head, shoulders, and rump, with cinnamon or pale 

 russet; dorsal stripes broad, clear white, bordered on each side with a 

 clear black stripe; underparts grayish white; feet white; under surface 

 of tail varying from pinkish cinnamon to tawny, bordered with black, 

 the sides tipped with pinkish buff. Summer pelage (specimen from Gros 

 Ventre Range, 12 miles northwest of Kendall, Wyo. ) : Head and mantle 

 tawny; sides of nose grayish white; white dorsal stripes tinged with bufl ; 

 median dorsal area vinaceous cinnamon, mixed with whitish; sides, un- 

 derparts, and feet washed with cinnamon-buff; tail as in winter pelage. 



25— Proc. Biol. Soc. Wash.. Vol. 30, 1917. (105) 



