150 CITELLUS. 
hands and feet gray or buff; tail grayish white and black above, 
beneath with sometimes central area buff but usually like upper part. 
Measurements. Total length, 530; tail vertebrz, 200; hind foot, 
60. Skull: occipito-nasal length, 57; Hensel 45; zygomatic width, 
36; interorbital width, 10; length of upper molar series, 6. 
b.—fisheri (Spermoplilus), Merr., Proc. Biol. Soc. Wash., vim, 
1893, p. 133. Elliot, Syn. N. Am. Mamm., 1901, p. 88. 
FISHER’S SPERMOPHILE. 
Type locality. Kern Valley, twenty-five miles above Kernville, 
Tulare County, California. 
Geogr. Distr. Lower California, Mexico, central and southern 
California to western border of Nevada. 
Genl. Char. Like C. v. beechey1, but paler; white shoulder stripes 
longer. 
Color. Similar to C. v. beechey1, but sides of neck and shoulder 
stripes silvery white; body spotted on sides with whitish bordered 
with dusky; lower part of face whitish; under parts and feet buffy. 
Measurements. Total length, 415; tail vertebre, 175; hind foot, 
58. Skull: occipito-nasal length, 53; Hensei, 43; zygomatic width, 
32.5; interorbital width, 8.5; palatal length, 25; length of upper molar 
series, II. 
c.—atricapillus (Spermophilus), Bryant, Proc. Calif. Acad. Scien., 
2d Ser., 11, 1889, p. 26. 
BLACK-HEADED SPERMOPHILE. 
Type localitv. Comondu, Lower California, Mexico. 
Geogr. Distr. Lower California. Northern Mexico (?) 
Genl. Char. Crown black, scapular region blackish. 
Color. Similar to C. v. grammurus, but crown black (varying in 
extent); orbital ring white; neck, scapulars, and interscapulars black, 
mixed with white and buff; rest of upper parts mixed buff and black; 
sides grayish or buffy white; under parts whitish; hands and feet 
buff; tail black above, the hairs tipped with buff at base and whitish 
on remaining portions, and edged with white, beneath black washed 
with white. 
Measurements. Total length, 535; tail, 235; hind foot, 50; 
(skin.) 
d.—rupestris (Citellus), Allen, Bull. Am. Mus. Nat. Hist., 1903, p. 595. 
Rock SPERMOPHILE. 
Type locality. Rio Sestin, State of Durango, Mexico. 
Genl. Char. Similar to C. v. grammurus, but larger, and crown 
and nape black. 
