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- 
tebrez, 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., vii, 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 vertebrz, 200; hind foot, 57. 
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 vertebre, 216; 
hind foot, 52.’’ (Merr., 1. c.) 
