pncA 



(vicinity of Mount Jefferson and Three Sisters) by the range 

 oi fumosa." (Howell) 



Dusky Pika. — Ochotona princeps fumosa (Howell). 



Size of hrunnescens (total length, 8 inches; hind foot, 1.3 

 inches), but upperparts blacker and less brown. Found on 

 "Western slopes of the Cascade Mountains in Oregon, from 

 the upper Clackamas River south at least to Three Sisters; 

 also mountains near Paulina Lake, Crook County." 

 (Howell) 



Collared Pika. — Ochotona collaris (Nelson) . 



Like tj^pical princeps in winter pelage but "coloration de- 

 cidedly more grayish and less buffy, both above and below; 

 a more or less distinct grayish patch on nape and shoulders." 

 (Howell) Total length, 7.6 inches; hind foot, 1.2 inches. 

 Found in "Central and southern Alaska and Yukon, from 

 Mount McKinley and the Ogilivie Range south to Teslin 

 Lake, British Columbia, and White Pass, Alaska." (Howell) 



Gray-headed Pika. — Ochotona schisticeps schisticeps (Mer- 

 riam) . 

 "Head and shoulders smoke-gray, mixed with fuscous; rest 

 of upperparts vinaceous-cinnamon, mixed with fuscous." 

 (Howell), in winter. Total length, 7.5 inches; hind foot, 

 1.2 inches. Found in " Boreal Zones of the northern Sierra 

 Nevada, from Mount Shasta south to Donner Pass; alti- 

 tudinal range from about 5,000 feet (on Mill Creek, above 

 Morgan, Tehama County) to at least 9,000 feet." 

 (Howell) 



Taylor Pika. — Ochotona schisticeps taylori (Grinnell). 



Smaller than typical schisticeps, more blackish, especially 

 on head. Total length, 7 inches; hind foot, 1.06 inches. 

 Found in "Northeastern California and southern Oregon, 

 from Madeline Plains north to Steens Mountains, Oregon, 

 and west to Goose Nest Mountain, Siskiyou County, Cali- 

 fornia; altitudinal range from 5,000 to 8,000 feet." 



Lava-bed Pika. — Ochotona schisticeps goldma?ii Howell. 



Resembling taylori but much darker in color, the darkest 

 form of the genus; total length, 7.3 inches; hind foot 1.2 

 inches. "Known only from Echo Crater and Fissure Crater, 

 Snake River Desert, Idaho." (Howell) 



Blue Mountains Pika. — Ochotona schisticeps jewetti Howell. 

 Like typical schisticeps but paler in summer and slightly 

 darker in winter, larger than taylori; total length, 7.3 

 inches; hind foot, 1.24 inches. Found in "Wallowa Moun- 

 tains, StrawbeiTy Mountains, and southern portion of Blue 

 Mountains, northeastern Oregon ; altitudinal range approxi- 

 mately from 5,000 to 10,000 feet." (Howell) 



Yosemite Pika. — Ochotona schisticeps muiri Grinnell and 



Storer. 



Resembling typical schisticeps but paler, with less fuscous 



suffusion on upperparts; total length, 7.5 inches; hind foot, 



1.2 inches. Found in "Central portion of Sierra Nevada, 



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