FIELD BOOK OF MAMMALS 



Tereticaudus Group 



Yuma Round-tailed Ground SquirreL — Citellus tereticaudus 

 tereticaudus (Baird). Plate XXIII. 

 A small Squirrel with plain, unspotted color pattern, very 

 small ears, short, cylindrical tail and hard, coarse pelage. 

 Upperparts (summer) uniform cinnamon-brown to pinkish 

 buff, the tips of hairs whitish to give finely speckled effect; 

 sides of head, Hmbs, and underparts white; tail above like 

 back, mixed with blackish toward tip, below, yellowish 

 with 'some black near tip. In winter, browner, with less 

 cinnamon tinge. Total length, lo inches; tail vertebrae, 

 4 inches; hind foot, 1.4 inches. Found in California from 

 as far north as Needles and west as eastern San Diego 

 County, south into Mexico ; Lower Sonoran Zone. 



Arizona Round-tailed Ground Squirrel.— Ci/g//w5 tereticaudus 

 arizoncB Grinnell. 

 Resembling typical tereticaudus but tail shorter and color 

 of upperparts redder — deep pinkish cinnamon tipped with 

 white. Total length, 9.4 inches; tail vertebras, 3 mches; 

 hind foot, 1.4 inches. Found in southwestern Arizona. 



Death Valley Round-tailed Ground Squirrel. — Citellus tereti- 

 caudus eremonomus (Elliot). 

 Differing from typical tereticaudus in slightly different color 

 of upperparts which is cinnamon with vinaceous tmge, 

 darker than in typical tereticaudus, with dark color of base 

 of pelage showing through. Total length, 10 inches; tail 

 vertebrae, 3.5 inches; hind foot, 1.4 mches. Found m 

 Death Vallev, Inyo County, California. 



Palm Springs Round-tailed Ground SqvihreX.— Citellus tereti- 

 caudus chlorus (Elliot). 

 Resembling typical tereticaudus in size but color different. 

 Upperparts olive-gray with brownish tinge; upperparts of 

 limbs olive-gray; hands brownish, feet whitish; tail above 

 hke back, with mixed blackish and brown near tip, below, 

 pale brown; underparts grayish white. Total length 10 

 inches; tail vertebra?, 4 inches; hmd foot, 1.65 inches. 

 Found in Riverside and San Diego Counties, California; 

 in Lower Sonoran Zone. 



Mohave Ground Squirrel. — Citellus mohavensis (Merriam). 

 Resembling the subspecies of tereticaudus in size, propor- 

 tions, and general color pattern but colored differently. 

 Upperparts uniform sandy gray with very famt tmge of 

 vinaceous, the hairs dusky at base and tipped with whitish 

 producing a finely grizzled effect; hands, feet, and under- 

 parts white; tail above like back, mixed with dusky on 

 terminal half, below whitish near base, mixed grayish and 

 dusky for terminal half. Total length, 10 inches; tail 

 vertebrae, 3 inches; hind foot, 1.5 inches. Found m the 

 Lower Sonoran Zone of southern California, from Mohave 

 Desert northeast to Daggett. 

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