EVOTOMYS 271 



sharply concave with prominent superciliary ridges. Zygomata 

 not abruptly spreading. Auditory bullae small and globose. 



For external and cranial measurements, see table at end of 

 volume. 



28^. Evotomys gapperi saturatus Rhoads. 

 1894. Evotomys gapperi saturatun Rhoads, Proc. Acad. Nat. Sci. 

 Philadelphia, p. 284 ; Bailey, Proc. Biol. See. Washington, 11, p. 128 ; 

 Miller, " List," 1912, p. 211 ; " List," 1924, p. 403. 



Type.—Rho&da Collection, No. 483 ; adult female, collected 

 August 17, 1892. 



Ty-pe locality. — Nelson, British Columbia; on the Kootenai 

 River, 30 miles north of the northern boundary of Washington. 



Range. — The Blue Mountains of Oregon, mountains of northern 

 Idaho, and northwards into British Columbia to Cariboo Lake 

 (near Kamloops). 



Characters. — Larger and longer-tailed than the typical form 

 with larger ears and stouter hind-feet. 



Mantle bright and rather light-reddish chestnut, closely 

 matching that of E. g. gapperi from Ontario and Western New 

 York, but beginning further behind the eyes. Sides, face, and 

 lower rump dark grey, with less ochraceous wash than in E. g. 

 gapperi. Belly washed with almost pure white. A white throat 

 patch frequently present. Ears large, protruding well out of 

 fur, slightly tipped with rufous. Feet grey. Tail indistinctly 

 bicoloured, dark grey above, light grey below. 



Skull larger, wider, and more angular than in E. g. gapperi. 

 Pterygoids longer and more slender. Auditory bullae slightly 

 larger. 



For external and cranial measurements, see table at end of 

 volume. 



Remarks. — Mr. Bailey says the name saturatus is misleading, 

 this subspecies being scarcely darker than E. g. gapperi and much 

 lighter-coloured than E. ohscurus, E. calif ornicus, E. occidentalis, 

 E. wrangeli, E. dawsoni, or E. carolinensis. 



29. Evotomys brevicaudus Merriam. 



1891. Evototni/s gapperi brevicaudus Merriam, N. Amer. Fauna, No. 5, 



p. 119. 

 1897. Evotomys brevicaudus Bailey, Proc. Biol. Soc. Washington, 11, 



p. 129; Miller, " List," 1912, p, 212; " List," 1924, p. 403. 



Type.— U.S. Nat. Mus., No. ^^Jy, Merriam Coll. ; adult male, 

 collected July 21, 1888, by Vernon Bailey. 



Type locality.— Three miles north of Custer, Black Hills, 

 Custer County, South Dakota. Altitude about 6000 feet. 



i?a«^e.— Boreal cap of Black Hills in South Dakota. 



Characters. — Size as in E. gapperi, with rather larger hind- 

 foot and much shorter tail. 



Colour in summer pelage paler than in E. g. gapperi and E. g. 



