THOMOMYS. 89 



Type locality. Touchet, Walla Walla County, Washington. 



Genl. Char. Larger than T. fuscus; color paler. 



Color. Ear and postauricular patch black; upperparts light 

 brown; sides and belly pale buffy gray; nose slaty; tail gray, tip 

 white; hands and feet whitish. Type in United States National 

 Museum. 



Measurements. Total length, 209; tail, 60; foot, 38. 



Thomomys fuscus saturatus Bailey. 



Thomomys fuscus saturatus Bailey, Proc. Biol. Soc. Wash., XXVII, 

 1914, p. 117. 



Type locality. Silver, in western corner of Missoula County, 

 Montana. Altitude, 4300 feet. 



Genl. Char. Larger than T. fuscus; skull long, high, braincase 

 narrow, nasals wide; color darker. 



Color. Nose plumbeous; ear-patch black; upperparts dark hazel ; 

 sides yellowish; underparts buffy; tail, hands and feet buffy gray. 

 Type in United States National Museum. 



Measurements. Total length, 225; tail, 77; foot, 30. 



Thomomys fuscus loringi Bailey. 



Thomomys fuscus loringi Bailey, Proc. Biol. Soc. Wash., XXVII, 

 1914, p. 118. 



Type locality. South Edmonton, Alberta, Canada. 



Genl. Char. Larger than T. fuscus; color duller; dentition heavier. 



Color. Black ear-patch; nose slaty gray; upperparts dull russet- 

 brown; sides buff; underparts buff, base of fur plumbeous; tail pale 

 buff; hands and feet soiled whitish. Type in United States National 

 Museum. 



Measurements. Total length, 199; tail, 47; foot, 25. 



Thomomys nevadensis atrogriseus Bailey. 



Thomomys nevadensis atrogriseus Bailey, Proc. Biol. Soc. Wash., 

 XXVII, 1914, p. 118 



Type locality. Nampa, Idaho. 



Genl. Char. Two phases, gray and black. Equal in size to T. 

 nevadensis; skull wider at base; pterygoids thicker. 



Color. Gray Phase. Nose and face blackish; ear-patch black; 

 upperparts dark buffy gray; underparts rich buff; lining of cheek 

 pouches black and white; chin white; tail, hands and feet white. Type 

 in United States National Museum. Black Phase. Dull slaty black 

 above and below; chin, toes and lower part of hands and feet white. 



Measurements. Total length, 315; tail, 100; foot, 38. 



