Mi THOMOMYS. 



length of upper molar series, 7.5; length of mandible, 22.2; length of 

 lower molar series, 7.9. Ex type in United States National Museum. 



Thomomys bottae minor Bailey. 



Thomomys hotter minor Bailey, Proc. Biol. Soc. Wash., XXVII, 

 1014, ]). 116. 



Type locality. Fort Bragg, Mcndocino County, California. 



Genl. Char. Smaller than T. bottcc with narrower skull, slender 

 rostrum, and posterior end of nasals emarginate. Color darker. 



Color. Xose, face and around ears blackish; upperparts dark 

 H imam on-brown and black; underparts ochraceous-buff ; lips white; 

 tail grayish; hands and feet white. Type in United States National 

 Museum. 



Measurements. Total length, 226; tail, 73: foot, 29. 



Thomomys alpinus awahnee Merriam. 



Thomomys alpinus awahnee Merr., Proc. Biol. Soc. Wash., XXI, 

 1908, p. 146. 



Type locality. Yosemite Valley, Mariposa County, California. 



Genl. Char. Size small; similar in color to :lf. alpinus. Skull 

 small, nasals narrow anteriorly; bullae small. 



Color. Summer. Entire pelage varying from russet-brown to near 

 ochraceous, brightest on sides of neck and flanks. Winter. Entire 

 pelage dusky tinged with sepia-brown, sometimes ochraceous brightest 

 on sides of neck and flanks; underparts mixed black and buff; tail 

 above dark gray on basal half, whitish beneath, blackish at tip; 

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



Measurements. Total length, 194; tail, 54; hind foot, 28. Skull: 

 Occipito-nasal length, 34.8; Hensel, 3.5; zygomatic width 21.4; 

 intertemporal width, 6.5; length of nasals, 11.9; length of palate, 6.5; 

 length of upper molar series, 7; length of mandible, 21.4; length of 

 lower molar series, 6.6. Ex type in United States National Museum. 



Thomomys apache Bailey. 



Thomomys apache Bailey, Proc. Biol. Soc. Wash., XXIII, 1910, 

 p. 79. 



Type locality. Lake La Jara, on the Jicarilla Apache Indian 

 Reservation, New Mexico. Altitude, 7500 feet. 



Genl. Char. Size large; hind feet and tip of tail white. 



Color. Upperparts sooty gray washed with bufTy ochraceous, 

 blackish dorsal stripe; tail blackish for three-fourths its length, re- 

 mainder white; lips, hands and feet white, chin sometimes white; 



