MANTLED GROUND SQUIRREL 



region grayish; mantle, in summer, dark chestnut-red- tail 

 above, black mixed with pale buff, below, pale buff- uiider- 

 parts grayish white; outer side of hind limbs pale brownish 

 Total length, ii inches; tail vertebra;. 3.8 inches; hind foot 

 1.6 inches. Found from Yellowstone Park north through 

 Montana and Idaho into Alberta. 



Hollister Mantled Ground SquirTeL—Callospermophilus later- 

 alis tescorum Hollister. 

 Larger, darker, and more richly colored than cinerascens' 

 upperparts grizzled brownish gray; mantle extensive dark 

 reddish brown; lateral stripes broad and well defined' espe- 

 cially anteriorly; hands, feet, lower sides, and underparts 

 creamy white, with buffy tinge on throat and upper foreleg 

 Total length, 12 inches; tail vertebrce., 4 inches; hind foot' 

 1.8 inches. Found in Alberta and British Columbia in the 

 vicinity of the Moose Pass branch of the Smoky River. 



Washington Mantled Ground SquiTreL—Callospermophilus 

 lateralis saturatus (Rhoads). 

 Differing from typical lateralis in larger size and darker 

 color. Summer pelage: Mantle chestnut mixed with black- 

 throat, breast, sides, and thighs rusty; dorsal region grizzled 

 rusty and black; underparts fulvous; tail above, blackish 

 mixed and edged with rusty, below, reddish yellow banded 

 with black. Total length, 12.2 inches; tail vertebrae 4 s 

 inches; hind foot, 1.8 inches. Found in the Cascade Moun- 

 tains of Washington; limits of range unknown. 



Chestnut-tailed Ground Squirrel.— Callospermophilns lateralis 



castanurus (Merriam). 

 Mantle bright rusty chestnut; inner black stripe nearly as 

 well developed as outer; dorsal region grizzled reddish 

 brown, black, and yellowish; tail above, black mixed with 

 yellow and reddish brown, below, deep chestnut banded 

 with black; underparts washed with whitish to yellowish 

 white. Total length, 11.5 inches; tail vertebrce, 2>-7 inches- 

 hmd foot, 1.7 inches. Found in the Wasatch Mountains 

 of Utah north into Wj'oming; limits of range unknown. 

 Golden Chipmunk; Sierra Mantled Ground Squirrel; Gilded 



Ground Squirrel. — Callospermophilus chrysodeirus chry- 



sodeirus (Merriam). Plate XXIII. 

 Differing from lateralis principally in having much better 

 developed inner black stripes. Mantle rusty chestnut 

 without any black mixture; dorsal region grizzled gray, 

 light brownish and blackish; inner black stripe well de- 

 fined, as long as outer; light stripe whitish or yellowish 

 white and much longer than black stripes; underparts pale 

 grayish white to pale yellowish white; upper surfaces of 

 hands and feet washed with yellowish white to ochraceous- 

 tail above, mixed black, yellowish, and grayish, below, deep 

 ochraceous banded with black. Total length, 11.5 inches- 

 tail vertebra;, 4.2 inches; hind foot, 1.8 inches. Found in 



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