MAMMALS 345 



hind foot 29 mm.: Bad Lands and plains of Dakota, Montana and 

 Wyoming. 



Subspecies of E. minimus 



E. m. caryi Merr. Color paler and grayer: San Luis Valley, 

 Colorado. 



E. m. consohrinus (Allen) . Size larger; colors darker : eastern border 

 of the Great Basin in Utah, Colorado and New Mexico. 



E. m. pictus (Allen). Colors pallid: Great Basin from western Utah 

 westward; northward to eastern Washington. 



E. m. alpimis (Merr.). Like E. m. pictus, but paler; tip of tail black; 

 length 189 mm.: high Sierras, California. 



E. callipeplus (Merr.). Top of head and nape drab; shoulders 

 ochraceous; flanks fulvous; length 212 mm.; tail 91 mm.; hind foot 

 34 mm.: Mount Pinos to the Yosemite Valley, California. 



E. cooperi (Baird). Color of anterior part of body grizzled gray; 

 whitish beneath; 3 dorsal stripes distinct, other two less marked; length 

 150 mm.; tail 82 mm.: Cascade Mountains, Skamania County, 

 Washington. 



E. pallidiis (Allen). Color ochraceous buff; length 220 mm.; tail 

 120 mm.; hind foot 35 mm.: South Dakota, Montana and western 

 Nebraska. 



4. Callospermophilus Merriam. Golden chipmunks; rock squirrels. 

 Body heavy, with i white and 2 black stripes on each side; head, fore 

 limbs and neck uniform reddish or yellowish brown; dentition 1/1,0/0, 

 2/1, 2,lz'- about 8 species, in mountain States of the far-west, in forests 

 of pine and fir; in feeding habits similar to chipmunks; they hibernate 

 often from 5 to 7 months; a single litter of 4 to 7 young raised. 



C. lateralis (Say). Color of back reddish brown; lateral stripe broad 

 and bordered above and below by a black stripe; under parts pale 

 brownish gray; length 275 mm.; tail 100 mm.; hind foot 43 mm.: 

 Arizona and New Mexico into Utah and Colorado; Transition and Lower 

 Boreal zones. 



Subspecies of C. lateralis 



C. I. saturatus (Rhoads). Size larger; length 317 mm.; colors darker: 

 central Washington. 



C. /. chrysodeirus (Merr.). Head, neck and shoulders ochraceous: 

 Oregon, northern California and western Nevada. 



C. bernardinus (Merr). Similar to C. I. chrysodeirus; color of head 

 and shoulders duller; length 242 mm.; tail 77 mm.; hind foot 34 mm.: 

 southern California. 



