FIELD BOOK OF MAMMALS 



Species and Subspecies of the Genus Ochotona 

 Subgenus Pika 



Rocky Mountain Pika. — Ochotona princeps princeps (Richard- 

 son). 

 As described above. Found in "Rocky Mountains, from 

 eastern British Columbia (headwaters South Pine River) 

 and western Alberta (Muskeg Creek) south along the main 

 divide to eastern Idaho and western Montana (Bitterroot 

 Mountains)." (Howell) 



Alberta Pika. — Ochotona princeps lutescens Howell. 



Like typical princeps but smaller; total length, 7.2 inches; 

 hind foot, 1.2 inches. Coloration paler. Found on "Mount 

 Inglesmaldie (near Banff) and other mountains in Canadian 

 National Park, Alberta, south to Mount Forget-me-not 

 (50 to 75 miles southwest of Calgary)." (Howell) 



Hollister Pika. — Ochotona princeps lev is (Hollister). 



Paler than typical princeps, darker than lutescens, size of 

 lutescens; total length, 7.3 inches; hind foot, 1.2 inches. 

 Found in "Mountains of southern Alberta and Montana 

 (east of the main divide) from Waterton Lake to the Belt 

 Mountains." (Howell) 



Lemhi Pika. — Ochotona princeps lemhi (Howell). 



Small, pale, and with narrow braincase. Total length, 7.2 

 inches; hind foot, 1.2 inches. Found in "Mountains of 

 south-central Idaho — the Lemhi, Lost River, Salmon River, 

 and Sawtooth Ranges; eastward to the Beaverhead Moun- 

 tains, east of Leadore; northern limits of range imperfectly 

 known." (Howell) 



Wyoming Pika. — Ochoto?ia princeps ventorum (Howell) . 



Like typical princeps, but summer pelage more buffy and 

 with less blackish mixture; darker than levis; total length, 

 8 inches; hind foot, 1.25 inches. Found in "Wind River, 

 Gros Ventre, Absaroka, and Teton Ranges, Wyoming, 

 north to the Beartooth and Absaroka Ranges in southern 

 Montana." (Howell) 



Uinta Pika. — Ochotona princeps uinta (Hollister). 



Similar to ventorum but more buffy in coloration; total 

 length, 8.2 inches; hind foot, 1.2 inches. Found in "The 

 Uinta and Wasatch Ranges, in Utah, and the Salt River and 

 Wyoming Ranges, in western Wyoming." (Howell) 



Ruby Mountains Pika. — Ochotona princeps nevadensis (Howell). 

 Paler than uinta, which it most resembles; total length, 8 

 inches; hind foot, 1.25 inches. "Known only from Ruby 

 Mountains, Nevada." (Howell) 



Figgins Pika. — Ochotona princeps figginsi (Allen). Plate 



XXXVII. 



Grayer than uinta and with more blackish; total length, 



7.6 inches; hind foot, 1.2 inches. Found in "Western 



Colorado, from Gunnison County north to eastern Routt 



472 



