THOMOMYS. 225 



336. monticola. {T/iotiumiys), Allen, Bull. Amer. Mas. Nat. Hist., 

 1893, p. 48, pi. I, figs. 3, 4. 



Type locality. Mt. Talac, Eldorado County, California. 



Geogr. Distr. Northern California from San Francisco Bay to 

 northwestern Nevada. 



Genl. Char. Skull long and narrow; outer face of upper incisors 

 with a ridge on inner edge; claws long and slender; tail one-third the 

 length of head and bodj-. 



Color. Above pale reddish brown tinged with gray; beneath 

 >hy white tinged with buff; around ears black. Feet and tail 

 whitish. 



Miasurements. Total length, 210; tail vertebra', 55; hind foot, 

 28; fore foot 20. 



a .--pinetorum . {T/iomomys), Merr., N. Am. Faun., No. 16, 1899, 

 p. 97. 



Type locality. Sisson, Siskiyou County, California. 



Geogr. Distr. Northern California, limits of range unknown. 



Genl. Char. "Similar to T. monticola, but smaller; skull shorter 

 and broader; colors paler." 



Color. " Above pale fulvous; nose dusky; sides of head plum- 

 beous or washed with buffy, or ochraceous." 



Measurements. " Total length, 210; tail vertebra', 76; hind foot, 

 28." (Merr., 1. c.) 



337. mazama. {Thomomys), Merr., Proc. Biol. See. Wash., 1897, 



p. 214. 



Type locality. Crater Lake, Mt. Mazama, Oregon. 



Geogr. Distr. Mt. Mazama, Oregon, range unknown. 



Genl. Char. Size small ; color similar to 7'. monticola, but 

 darker. 



Color. Above fulvous brown ; beneath washed with fulvous; nose, 

 orbital and aural space dusky; feet and tail whitish. 



Measurements. Total length, 214; tail vertebr<x', 71; hind 

 foot, 27.5. 



338. quadratus. {Thomomys"), Merr., Proc. Biol. Soc. Wash., 1897, 



p. 214. 



Type locality. The Dalles, Oregon. 



Geogr. Distr. Oregon, Plains of the Columbia? 



Genl. Char. Similar to T. mazama in color; skull short and 

 broad; zygoma with anterior external angle nearly square; jugals 

 parallel; nasals short, broad, truncate posteriorly; upper incisors not 

 sloping forward. 



