276 THOMOMYS. 



681. Thomomys quadratus Merriam. 



Thomomys quadratus Merr., Proc. Biol. Soc. Wash., xi, 1897, 

 p. 214. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, 

 p. 225. Zool. Ser. 

 The Dalles Pocket Gopher. 



Type locality. The Dalles, Wasco County, Oregon. 



Geogr. Distr. Oregon. Plains of the Columbia. 



682. Thomomys myops Merriam. 



Thomomys m.yops Merr., Proc. Biol. Soc. Wash., xiv, igoi, p. 112. 

 Near-sighted Pocket Gopher. 



Type locality. Conconully, east base of Cascade Range, Okanogan 

 County, Washington. 



Geogr. Distr. Washington. Range unknown. 



Genl. Char. Size small. Skull similar to that of T. quadratus , 

 but with comparative differences, such as a less quadrate zygomata 

 with shorter posterior root; broader nasals, equal in length to pre- 

 maxillas and truncated posteriorly. 



Color. Upper parts dull rufous brown; chin, throat, hands, and 

 feet white ; under parts buffy ochraceous, base of fur dark slate ; sides 

 of mouth and orbital ring plumbeous. 



Measurements. Total length, 197 ; tail vertebrae, 63 ; hind foot, 26, 



683. Thomomys nasicus Merriam. 



Thom,om,ys nasicus Merr., Proc. Biol. Soc. Wash.; xi, 1897, P- 216. 

 Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, p. 226. 

 Zool. Ser. 

 Large-nosed Pocket Gopher. 



Type locality. Farewell Bend, Des Chutes River, Crook County, 

 Oregon. 



Geogr. Distr. Oregon. Range unknown. 



684. Thomomys niger Merriam. 



Thomomys niger Merr., Proc. Biol. Soc. Wash., xiv, 1901, p. 117. 

 Black Pocket Gopher. 



Type locality. Seaton, near mouth of Umpqua River, Douglas 

 County, Oregon. 



Geogr. Distr. Known only from the type locality. 



Genl. Char. Size medium; feet large. Skull with temporal ridges; 

 interparietal oval; nasals emarginate, narrowed posteriorly. 



Color. Slaty black with greenish reflections; feet and tail white, 

 sometimes blotched with dusky. Probably melanistic individuals of 

 T. douglasi. 



Measurements. Total length, 225 ; tail vertebrae, 81 ; hind foot, 30. 



