CITELLUS. 145 



fawn; under parts and inner sides of legs and hind feet white, the 

 last washed with rufous; tail above at base like back, remainder 

 fawn color bordered with black and fringed with whitish rufous, 

 beneath pale rufous. 



Measurements. Total length, 220; tail vertebrae, 65; hind foot, 

 33. Skull: occipito-nasal length, 37.5; Hensel, 30; zygomatic width, 

 24; interorbital width, 9; length of nasals, 6; palatal length, 18; 

 length of upper tooth row, alveolar border, 7. 



107. perotensis (Spermophilus), Merr., Proc. Biol. Soc. Wash., vm, 



1893, p. 131. 

 PEROTE SPERMOPHILE. 



Type locality. Perote, State of Vera Cruz, Mexico. 



Geogr. Distr. State of Vera Cruz, Mexico; extreme eastern border 

 of tableland. Altitude 8,000-10,000 feet. 



Genl.Char. Similar to C. elegans. Skull large, heavy ; molars with 

 broad crowns. 



Color. Above grizzled yellowish brown irregularly lined with 

 black posteriorly; under parts, hands, and feet buffy; tail above 

 mixed black and yellowish brown, beneath ochraceous buff with a 

 subapical black band. 



Measurements. Total length, 253 ; tail vertebrae, 68; hind foot, 38. 



108. spilosoma (Spermophilus), Bennett, Proc. Zool. Soc., 1833, p. 



40. Elliot, Syn. N. Am. Mamm., 1901, p. 96. 



mexicanus, Aud. & Bachm., Quad. N. Am., in, 1853, p. 42, pi. 



cix. 

 SPOTTED SPERMOPHILE. 



Type locality. "That part of California that adjoins Mexico." 

 Western Texas? 



Geogr. Distr. Janos, State of Sonora, Mexico, north into Texas 

 and New Mexico. Altitude, 5,600 feet. 



GcnL Char. Size small ; ears very short ; tail about half the length 

 of body. 



Color. Above reddish brown spotted with white (bordered with 

 black posteriorly in the young) ; under parts yellowish white ; tail 

 above like back, with subterminal black bar, tip yellowish brown, 

 beneath brownish yellow, bordered with black and fringed with 

 yellowish. 



Measurements. Total length, 255; tail vertebrae, 75; hind foot, 

 3 2 - 



a. niicTospilotus (Spermophilus), Merr., N. Am. Faun., No. 4, 

 1890, p. 38. Elliot, Syn. N. Am. Mamm., 1901, p. 96. 



