176 EVOTOMYS. 



foot, 18.7. Skull: basal length, 23.3; nasals, 7.2: zygomatic breadth, 

 14.2; mastoid, 12.4; length of upper molar series, 5. 



250. obscurus. {EvotLimys), Merr., Proc. Biol. Soc. Wash., 1897, p. 72. 



Type locality. Prospect, Upper Rogue River Valley, Oregon. 



Geogr. Distr. West slope of southern Cascade Range and north- 

 ern Sierra Nevada in southern Oregon and northern California. 



Genl. Char. Similar to E. mazama, color grayish, glands incon- 

 spicuous. 



Color, Above olive gray; dorsal area cinnamon rufous mixed 

 with black, illy defined; face and sides gray; beneath dull buff; ears 

 dusky; feet dusky gray; tail bicolor. 



Measurements. Total length, 155; tail vertebra;, 47; hind foot, 17. 

 Skull: basal length, 21. S; zygomatic breadth, 13.3; mastoid, 11. 5; 

 length of molar series, 4.5. 



351. californicus. {Evotomys), Merr., N. Am. Faun., No. 4, p. 26, pi. 

 II, fig. 2. 



Type locality. Eureka, Humboldt County, California. 



Geogr. Distr. Coast of Oregon and northern California. 



Genl. Char. Size large; tail long; colors dark; ears small; lat- 

 eral glands wrell defined. Skull with short, stout decurved rostrum; 

 pterygoids and bullae larger than in any other species; palatines tri- 

 angular in outline and with a posterior projection; zygomata bent 

 down, not abruptly spreading; molars wide and heavy; posterior 

 upper molar short; terminal loop verj- small or absent. 



Color. Above sepia; dark chestnut on back, and dusky on rump; 

 glandular spots plumbeous, beneath pale buffy; feet whitish; ears 

 dusky; tail blackish above, whitish beneath. 



Measurements. Total length, 161; tail vertebrae, 50; hind foot, 21. 

 Skull: basal length, 22.8; nasals, 7.5; zygomatic breadth, 14; mas- 

 toid, 12.3; length of upper molar series, 5.3. 



252. occidentalis. [Evotomys), Merr., N. Am. Faun., No. 4, p. 25, pi. 

 II, fig. I. 

 pygmcRus, Rhoads, Proc. Acad. Nat. Scien. Phil., 1894, p. 284. 



Type locality. Aberdeen, Washington. 



Geogr. Distr. Puget Sound and coast region of Washington, 

 and southern British Columbia. 



Genl. Char. Smaller than E. californicus ; tail long, slender; 

 skull thin, light; audital bullae much inflated, approaching each other 

 over basioccipital; pterygoids fiat, perforated at base; palatines with 

 a posterior projection. 



Color. Above dull burnt umber or dark chestnut lined with 



