FIELD BOOK OF MAMMALS 



Enemies. — Hawks, Weasels, Coyotes, Foxes, Badgers, and 

 other small carnivores. 



Species and Subspecies of the Genus Callospermophilus 



Say Ground Squirrel; Say Mantled Ground Squirrel. — 



Callospermophilus lateralis lateralis (Say). Plate XXIII. 

 As described. Found in the mountainous, forested parts of 

 Arizona and New Mexico north to Wyoming. 



Gary Mantled Ground Squirrel. — Callospermophilus lateralis 

 caryi Howell. 

 Upperparts grayer than in typical lateralis, with more 

 strongly contrasting black and white stripes, white of sides 

 and underparts clearer, and underside of tail darker; upper- 

 parts — summer — vinaceous cinnamon mixed with whitish; 

 white dorsal stripes tinged with buff; mantle and top of 

 head tawny. Total length, ii inches; tail vertebrae, 3.8 

 inches; hind foot, i .6 inches. Found in the Wind River and 

 Gros Ventre ranges of Wyoming. 



Charleston Mountain Ground Squirrel. — Callospermophilus 

 lateralis certus Goldman. 

 "Distinguished by pale general coloration in combination 

 with dark russet under side of tail; ... a dark, rich russet, 

 instead of ochraceous-buff or ochraceous-tawny tone." 

 Upperparts — summer — ^grizzled grayish brown; mantle 

 tawny to tawny-ochraceous; "inner black stripes broad and 

 distinct." (Goldman) Total length, 10 inches; tail verte- 

 brae, 3 inches; hind foot, 1.5 inches. Found only in the 

 Charleston Mountains in southern Nevada. 



Nevada Mantled Ground Squirrel. — Callospermophilus later- 

 alis trepidiis Taylor. 

 Color in summer pelage: Mantle light ochraceous, three 

 lateral stripes broad; dorsal area between stripes grizzled 

 ochraceous, black and white; sides whitish with faint brown- 

 ish tinge; underparts white, pelage slate-colored at base; 

 tail above, black sprinkled with light ochraceous, below, 

 darker ochraceous, banded with black. Total length, 10.8 

 inches; tail vertebrae, 4 inches; hind foot, 1.6 inches. Found 

 in the Pine Forest Mountains, Humboldt County, Nevada. 



Wortman Mantled Ground Squirrel. — Callospermophilus lat- 

 eralis wortmani (Allen). 

 Similar to typical lateralis in size, but paler throughout and 

 usually lacking the inner pair of black stripes ; white lateral 

 stripe whiter ; mantle a much paler shade of reddish brown ; 

 upper surfaces of hands and feet almost white. Found from 

 Sweetwater County, Wyoming, south into the northwestern 

 corner of Colorado (Routt Co.). 



Montana Mantled Ground Squirrel. — Callospermophilus later- 

 alis cinerascens (Merriam). 

 Very similar to lateralis in size and general appearance. 

 Inner black stripes present but short; general tone of dorsal 



