Descriptions of East Asiatic Mammals 209 
The subgenus Pika, which includes the three American Pikas, 
has a more easterly and northeasterly range than true Ochotona 
and reaches the Arctic Ocean in extreme northeastern Siberia. 
The principal species is Ochotona alpina. An allied species, 
hyperborea, has many races in the east : O. h. kolymensis at the 
Arctic Ocean (Kolyma River) and southward, O. h. lit t oralis 
in the Tschuktshi region, 0. h. 
mantschurica in the Khingan 
Mountains, O. h. cinereo-fusca 
in Amur, O. h. core ana from 
Korea at about 3000 feet. 
Other related species inhabit 
the interior of Asia from the 
Altai Mountains southward to 
Tibet, Szechwan, and Kansu 
at about 10,000 feet, where the 
rather large Red-eared Pika, 
P. erythrotis, is found. 
The Red-eared Pika is colored drabby gray, with the ears 
bright rusty red and a tuft of white hairs at their bases in front. 
The underparts are whitish, with a slightly different buff color 
and buff wash reaching back along the middle of the body. The 
feet are white. This is the winter color ; in summer the dorsal 
fur is reddish throughout. The length of the head and body is 
8 to 9 inches, hind foot 1% inches. 
The Manchurian Pika, O. hyperborea mantschurica, is said 
to live in crevices and burrows among basaltic rocks, and to 
conceal stocks of hay in hollows and crevices instead of assem- 
bling it in heaps in the open like the Dahurian Pika. It is social 
and may sometimes be found in large colonies. Long, well-worn 
runways are used. The voice is a sharp, short whistle, in marked 
contrast to the modulated, almost musical tones of the Dahurian 
Pika. This Pika lives in moss-hung forests of larch and rhodo- 
dendron. It is subject to parasitism by the fly Hypoderma, which 
Fig. 48. Asiatic Pika, Ochotona 
hyperborea. 
