Oa SPERMOPHILUS. 



Color. Similar to .S'. cmpetra, but there is an obscure brownish 

 streak on back ; upper part of neck blackish ; side of face mixed 

 black and white ; hind parts of hips and thighs brownish red, as are 

 also the feet. Light markings fulvous. 



Measuremfitls. Total length, 370; tail vertebrae, 88; hind foot, 44. 



114. richardsoni. i^Arctomys), Sabine, Trans. Linn. Soc, 1822, p. 389, 



pi. 28. 



guttatus. Rich. Faun. Bor. Am., 1829, p. 162. (nee Tenim). 



Type locality. Carlton House, Arctic America. 



Geogr. Distr. From Aberdeen, South Dakota, to North Dakota 

 and Montana, west to Rocky Mountains and north to the Saskatche- 

 wan River to latitude 55°. 



Genl. Char. Small, tail one-third length head and body ; ear 

 short. 



Color. Above grayish buff mixed with black and dotted with 

 buff ; neck, shoulders and under parts light buff, shading gradually 

 into the color of upper parts. Tail above rusty brown and black, 

 edged with yellowish white ; beneath buff. 



Measurements. Average total length, 311; tail vertebrae, 82; 

 hind foot, 46. 



115. townsendii. (Sperinophilus), Bachm. Jour. Acad. Nat. Scien. Phil., 



1839, p. 61. 



Type locality. Plains of Columbia near mouth of Walla Walla 

 River. 



Geogr. Distr. Nebraska westward to Plains of Columbia River, 

 and from Wyoming and Utah to Montana, Idaho and Oregon. 



Genl. Char. Small ; ears very small ; tail short ; colors dark. 



Color. Above gray and black mixed, with a wash of dark reddish 

 brown along back, and all indistinctly mottled. Rump and outside 

 of legs reddish brown ; under parts grayish white tinged with brown- 

 ish yellow. Tail above black, edged with yellowish white ; beneath 

 reddish. 



Measurements. Total length, 305; tail vertebrae, go; hind foot, 37. 



116. mollis. {Spermophilus), Kennicott, Proc. Acad. Nat. Scien. Phil., 



1863, p. 158. 



Type locality. Camp Floyd, Utah. 



Geogr. Distr. Utah and Nevada, exact range not determined. 



Genl. Char. Form stout ; muzzle short, compressed, ears rudi- 

 mentary ; feet large, claws weak, compressed. 



Color. Above variegated silvery gray, yellowish brown and black; 

 under parts silvery gray washed with creamy yellow. Tail above 



