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 vertebrae, 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 (Spermophilus), Merr., Proc. Biol. Soc. Wash., vin, 



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. beecheyi, but paler; white shoulder stripes 

 longer. 



Color. Similar to C. v. beecheyi, 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 vertebras, 175; hind foot, 

 58. Skull: occipito-nasal length, 53; Hensel, 43; zygomatic width, 

 32.5 ; interorbital width, 8.5 ; palatal length, 25 ; length of upper molar 

 series, u. 



c. atrieapillus (Spermophilus), Bryant, Proc. Calif. Acad. Scien., 



2d Ser., n, 1889, p. 26. 

 BLACK-HEADED SPERMOPHILE. 



Type locality. 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. 



