106 Proceedings of the Biological Society of Washington. 



Ochotona uinta ventorum, subsp. nov. 



Type. — No. 176,778, U. S. National Museum, Biological Survey collec- 

 tion; cf adult, skin and skull; from Fremont Peak, Wind River Mountains, 

 Wyoming; collected July 19, 1911, by H. E. Anthony; original number 395. 



Subspecific characters. — Size of uinta; color in winter pelage paler and 

 more grayish (less buffy); hind feet paler; summer pelage less intensely 

 buffy, both dorsally and ventrally. Compared with princeps: Size larger; 

 color in both pelages paler (less blackish). 



Color. — Type (acquiring summer pelage) : Head, shoulders, and fore back 

 cinnamon-buff, strongly washed with fuscous-black; sides and hinder back 

 (in worn winter pelage) smoke gray, faintly washed with pinkish buff; 

 ears chaetura drab, margined with buffy white; feet pale pinkish buff; 

 soles hair-brown; palms soiled buffy white; underparts soiled whitish, 

 faintly washed with light buff. Winter pelage (specimen from Jackson, 

 Wyoming, September 19) : General tone of upperparts between drab and 

 wood brown, shading on sides to light pinkish cinnamon; front of face 

 washed with clay color; head and back washed with fuscous; rump blotched 

 with blackish; underparts soiled white, faintly washed with pinkish buff; 

 ears deep mouse gray; feet pinkish buff. 



Skull. — Closely similar to that of uinta; larger than that of princeps, 

 with longer nasals. 



Measurements. — Type (adult cf): Total length, 186; hind foot, 31. 

 Skull: Occipito-nasal length, 44; zygomatic breadth, 21.5; breadth of 

 cranium 17.8; interorbital breadth, 4.6; width of palatal bridge, 2; length 

 of nasals, 15. 



Remarks. — This race occupies the Wind River, Gros Ventre, Absaroka, 

 and Teton Ranges in northwestern Wyoming and the Beartooth Mountains 

 in southwestern Montana. It is closely related to uinta, as shown by the 

 skull; the coloration in all pelages is more grayish and less buffy, this 

 difference being most strikingly shown in the worn winter pelage of June 

 or July specimens. 



Ochotona uinta lemhi, subsp. nov. 



Type. — No. Mfffj U. S. National Museum, Biological Survey collection; 

 Q adult, skin and skull; from Lemhi Mountains, 10 miles west of Junction, 

 Idaho; collected August 19, 1890, by Clark P. Streator; original number 174. 



Subspecific characters. — Size small (much smaller than ventorum; slightly 

 smaller than princeps); color in summer pelage similar to ventorum but 

 paler; much paler than princeps; in winter pelage nearest to princeps, but 

 paler and more grayish. 



Color. — Type (acquiring summer pelage) : Head, shoulders, and fore back 

 cinnamon buff, washed with fuscous; hinder back (retaining worn winter 

 pelage) smoke gray, washed with fuscous; sides grayish white, washed with 

 pinkish buff ; feet pinkish buff, the soles hair-brown; ears externally chaetura 

 black, internally fuscous, with light buff hairs, the margins light buff; 

 underparts soiled whitish, moderately washed with pinkish buff. 



Skull. — Similar to that of ventorum, but shorter and relatively broader; 



