CITELLUS. 151 



Color. Front, top, and sides of head black; nose and eyes grayish 

 brown ; white patch above and below eye ; upper parts mixed blackish 

 brown and whitish, darkest on anterior half of dorsal region and 

 suffused with yellowish brown; sides paler and grayer; throat, upper 

 breast, and axial region ochraceous buff; rest .of under parts yellowish 

 buff; fore feet yellowish gray; hind feet more strongly yellow; ear 

 black; tail above grizzled black and white, the hairs ringed with 

 black and whitish and tipped with white, beneath pale yellowish 

 white, margined on each side with three black bands, the outer one 

 the broadest. 



Measurements. Total length, 520; head and body, 279; tail ver- 

 tebrae, 241; hind foot, 64; ear, 25. Skull: total length, 66; zygo- 

 matic width, 40; length of nasals, 23 ; length of upper tooth row, 13. 



112. annulatus (Spermophilus}, Aud. & Bachm., Jour. Acad. Nat. 



Scien. Phil., vin, 1842, p. 319. 

 RING-TAILED SPERMOPHILE. 



Type locality. None given; probably western Mexico. 



Geogr. Distr. Plains of State of Colima, and Territorio de Tepic, 

 western Mexico; extent of range unknown. 



Genl. Char. Body squirrel-like; tail long, rather bushy, ringed; 

 ears broad and rather high, rounded; claws short, curved; pelage 

 coarse, stiff. 



Color. Top of head black, speckled with deep buff; entire upper 

 parts and sides mixed black and pale yellow; sides of head, neck, 

 outer surface of arms and hands, legs, and feet reddish brown, nearly 

 chestnut; inner side of thighs, and under parts straw yellow; basal 

 portion of hairs on abdomen black; tail at base like back, rest of 

 upper part alternately banded with black and pale yellow, beneath 

 reddish cinnamon, with a narrow interrupted black border edged 

 with yellow. 



Measurements. Total length, 405 ; tail vertebrae, 200 ; hind foot, 5 7 . 



a. goldmani (Spermophilus}, Merr., Proc. Biol. Soc. Wash., xv, 



1902, p. 69. 

 GOLDMAN'S SPERMOPHILE. 



Type locality. Santiago, Territorio de Tepic, Mexico. 



Genl. Char. "Similar to (C.) annulatus, but hind foot smaller 

 (averaging 52.5 instead of 56.5); whitish eyelids clearer and more 

 distinct; ferrugineous of face, neck, thighs, and tail less extensive and 

 usually less intense." 



Measurements. "Type. Total length, 430; tail vertebrae, 216; 

 hind foot, 52." (Merr., 1. c.) 



