88 THOMOMYS. 



Thomomys mewa Merriam. 



Thomomys mewa Merr., Proc. Biol. Soc. Wash., XXI, 1908, p. 146. 



Type locality. Raymond, Madera County, California. 



Genl. Char. Two phases of pelage, summer varying from ful- 

 vous to ferruginous; winter dusky tinged with russet-brown. Skull 

 small; nasals straight not narrowing posteriorly; anterior angle of 

 zygomata thickened. 



Color. Summer. Upper and under parts fulvous to ferruginous. 

 Winter. Upperparts dusky, tinged with russet-brown; underparts 

 plumbeous washed with buffy ochraceous; tail pale fulvous; hands 

 and feet whitish. Ex type in United States National Museum. 



Measurements. Total length, 225; tail, 60; hind foot, 27. Skull: 

 Occipito-nasal length, 37.5; Hensel, 35.5; zygomatic width, 2.5; 

 intertemporal width, 6.3; length of nasals, 12; palatal length. 6.6; 

 length of upper molar series, 7.4; length of lower molar series, 23.7. 

 Ex type in United States National Museum. 



Thomomys neglectus Bailey. 



Thomomys neglectus Bailey, Proc. Biol. Soc. Wash., XXVII, 1914, 

 p. 117. 



Type locality. Bear Flat Meadow, San Antonio Peak, San Gabriel 

 Mountains, California. Altitude 6400 feet. 



Genl. Char. Size medium; skull long, narrow; color very dark. 



Color. Nose, face and ear-patch blackish; upperparts dark gray, 

 hairs black-tipped; underparts dull buff; tail gray; hands and feet 

 whitish. Type in United States National Museum. 



Measurements. Total length, 229; tail, 77; foot, 31. 



Thomomys mearnsi Bailey. 



Thomomys mearnsi Bailey, Proc. Biol. Soc. Wash., XXVII, 1914, 

 p. 117. 



Type locality. Gray's Ranch, in Animas Valley, southwest corner 

 of New Mexico. 



Genl. Char. Smaller than T. fulvus; skull short, wide, projecting 

 incisors very slender. 



Color. Nose and ear-patches blackish; upperparts dull cinnamon ; 

 underparts pale cinnamon; tail buffy gray; hands and feet whitish. 

 Type in United States National Museum. 



Measurements. Total length, 220; tail, 69; foot, 31. 



Thomomys fuscus columbianus Bailey. 



Thomomys fuscus columbianus Bailey, Proc. Biol. Soc. Wash., 

 XXVII, 1914, p. 117. 



