EVOTOMYS 275 



Remarks. — Bailey states that this species differs conspicuously 

 in colour from the dark-coloured coast species, but needs careful 

 comparison with E. obscurus. Judging from the description 

 quoted above E. niazain-a may be an American representative of 

 the E. rufocaihiis group ; the non-rufous ear and angular skull 

 appear to support such a suggestion. 



35. Evotomys obscurus Merriam. 

 1897. Evotomys obscurus Merriam, Proc. Biol. See. Washington, 11, 

 p. 72; Bailey, ibid., p. 133; Miller, " List," 1912, p. 212; "List," 

 1924, p. 404. 



Type.— U.S. Nat. Mus., No. 80413 ; adult male, collected 

 August 29, 1896, by E. A. Preble. 



Type locality. — Prospect, Upper Rogue River, Valley, Jackson 

 County, Oregon. Altitude about 2600 feet. 



Range. — West slope of the Southern Cascade Range and 

 northern Sierra Nevada in southern Oregon and northern 

 California. 



Characters. — Size medium (hind-foot 17 mm. ; basal length 

 of skull 21-8), tail nearly half the length of the body. 



Upper parts olive grey, with an ill-defined mantle of cinnamon 

 rufous, obscured by black hairs ; lower flanks and face clear grey ; 

 belly washed with dull buff. Ears dusky, not rufous tipped. Feet 

 dusky grey. Tail bicoloured. Side glands inconspicuous but 

 present. 



Skull " less angular and abruptly spreading than that of E. 

 mazama and with a more arched dorsal line; rostrum short, 

 decurved, with lower outline well arched ; anterior palatal 

 foramina short and wide. Palate and auditory bullae as in E. 

 mazama. ' 



For external and cranial measurements, see table at end of 

 volume. 



Remarks. — Bailey says that in both geographic position and 

 specific character this species lies between E. mazama of the 

 summit of the Cascade Mountains and E. californicns of the coastal 

 region. There is no evidence of intergradation with E. mazama, 

 although the two species may come in contact; but some slight 

 approach towards E. califonticus is shown by specimens from 

 Carberry Ranch, California. 



36. Evotomys californicus Merriam. 

 1890. Evotomys californicus Merriam, N. Amer. Fauna, No. 4, p. 26; 

 Bailey, Proc. Biol. Soc. Washington, 11, p. 133, 1897; Miller, 

 " List,'= 1912, p. 213; " List," 1924, p. 404. 



Type.~U.S. Nat. Mus., No. i^r^i ; adult male, collected 

 June 3, 1889, by T. S. Palmer. 



Type locality. — Eureka, Humboldt County, California. 

 Range. — Coast strip of Oregon and northern California. 



