SPERMOPHILUS. 05 



Gcnl. Char. Similar to A', beldingi, but gray and without red dor- 

 sal area and head patch. 



Color. Above grizzled buffy gray, inclining to fulvous on back; 

 under parts buff, feet whitish buff. Tail like back at base; remainder 

 black and fulvous, edged with hoary and tip black; below chestnut 

 bordered with black and fringed with hoary. 



MinsHremeiils. Total length, 265; tail vertebra-, 57; hind 

 foot, 42. 



E. Xerospennophilus 



Size small. Skull short, broad, interorbital space broad, con- 

 striction one-third less the widest part; nasals broad, not so long as 

 prema.\illaries. First premolar one-third the second in size. Tail 

 one-thirtl the length of head and bodv. 



Fig. 21. SPERMOPHILUS (Xerospermophilus) microspilotus. 

 No. 703 Field Columbian .Museum Coll. Nat. size. 



Upper tooth row. 

 Enlarged 4 times. 



Lower tooth row. 

 Enlarged 4 times. 



121. obsoletus. (Spermophilus), Kennicott, Proc. Acad. Nat. Scien., 

 Phil., 1863, p. 157. 



Type locality. Nebraska. 



Geogr. Distr. Black Hills, South Dakota, into Nebraska, and 

 westward to Utah. 



Genl. Char. Head narrow, nose long, pointed; tail short, ears 

 small. 



Color. Above sandy gray grizzled with white, spotted indis- 

 tinctly posteriorly with whitish; stripe under eye, nose, and edge of 



