FIELD BOOK OF MAMMALS 



the mountains of southern and eastern Oregon south into 

 CaHfomia as far south as Tulare County. 



Callos pernio philus chrysodeirus trinitatis Merriam = Cal- 

 lospermophilus chrysodeirus chrysodeirus. 



San Bernardino Mantled Ground Squirrel. — Callospermophi- 

 lus chrysodeirus ber?iardinus (Merriam). 

 Resembling typical chrysodeirus but mantle duller in tone, 

 and with shorter tail and hind foot. _ Mantle dull fulvous, 

 top of head darker; otherwise very similar to typical chry- 

 sodeirus. Total length, ii inches; tail vertebrae, 3.6 inches; 

 hind foot, 1.7 inches. Found in the San Bernardino Moun- 

 tains of California. 



Inyo Mantled Ground Squirrel.^ — Callospermophilus chryso- 

 deirus perpallidus Grinnell. 

 A pale desert-range race of chrysodeirus, compared with 

 which it has "general coloration paler; middle of back, 

 rump and sides, more ashy in tone, head less richly tawny, 

 and under surface of body whiter. As a result, the black 

 dorsal stripes give an impression of greater sharpness." 

 (Grinnell) Total length, 10.6 inches; tail vertebrae, 3.6 

 inches; hind foot, 1.6 inches. Found in the Inyo Moun- 

 tains and the White Mountains of California. 



The Golden Mantled Ground Squirrels, or to reduce a long 

 name, the Mantled Ground Squirrels, look and behave very 

 much like big Chipmunks. They are found only in the 

 western part of North America and their range does not meet 

 anywhere with the range of the Eastern Chipmunks (Tamias), 

 which they most resemble. From the Western Chipmunks, 

 the Mantled Ground Squirrels are readily distinguished on 

 the basis of their much larger size, less striped upperparts, 

 and reddish or tawny head and shoulders. 



The members of the genus Callospermophilus are true 

 Ground Squirrels, or Spermophiles, living on the ground and 

 seldom climbing any distance above it. They dig burrows 

 in the earth, make use of crevices in the rocks or under logs, 

 and are often found living side by side with the smaller Chip- 

 munks {Eutamias). They are active, alert little rodents, 

 beautiful when in full summer pelage, and are usually rather 

 unsuspicious and easily observed. Where they are unmolested 

 they quickly become audacious and I have seen them about a 

 mining camp become so tame that they would come up to 

 take food from the hands of the men. Mantled Ground 

 Squirrels run about over the open ground, among the rocks 



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