EVOTOMYS 265 



characters : skull less massive ; rostrum longer and slenderer ; 

 audital bullae smaller ; pterygoids more prominent ; nasals sharp- 

 tipped or rounded posteriorly instead of truncate ; molar series 

 much narrower and slenderer. In external characters it slightly 

 resembles E. rufocanus of Northern Europe, but differs widely 

 from that species in cranial characters." 



Osgood ^ has (with Miller's approval) identified Miller's 

 E. alascensis, described from St. Michael, Norton Sound, Alaska, 

 with E. dawsoni. It is a little difficult, in the absence of material, 

 to reconcile Miller's description of the bulltio in E. alascensis 

 (" large, their greatest breadth considerably more than alveolar 

 length of maxillary molar series ") with the description of those 

 of E. dawsoni quoted above from Bailey. 



26a. Evotomys dawsoni dawsoni Merriam. 



1888. Evotomys dawsoni ^lerriam, Amer. Nat., 22, p. 650; Bailey, 



Proc. Biol. Soc. Washington, 11, p. 121, 1897. 

 1898. Evotomys alascensis Miller, Proc. Acad. Nat. Sci. Philadelphia, 



p. 364 ; described from St. Michael, Norton Sound, Alaska ; type : 



U.S. Nat. Mas. No. ^^Hij. (Identified with dawsoiii by Csgood, 



N. Amer. Fauna, Nor2'4, p. 34, 1904.) 

 1912. Evotomys dawsoni dawsoni Miller, " List," p. 210; " List," 1924, 



p. 401. 



Type.—V.a. Nat. Mus., collected June 23, 1887, by Dr. G. M. 

 Dawson. 



Type locality. — Finlayson River, a northern source of the Liard 

 River, lat. 61° 30' N., long. 129° 30' W., Yukon, Canada. Altitude 

 3,000 feet. 



Range. — From Finlayson River and Fort Liard west to Yakutat 

 and Juneau, and north along the coast to Norton Sound. 



Characters. — Size, general form and skull as described above 

 under the species. 



Colour : Mantle sharply defined, extending from just behind 

 the eyes to the base of the tail, bright ferruginous with few dark 

 hairs. Face, sides, and rump bufiy ochraceous. Belly thinly 

 washed with pale buff. Ears covered on inner surface of tips 

 with short, rufous hairs ; an indistinct yellowish post-auricular 

 spot ; eyes encircled by faint yellowish rings ; tufts of rufous 

 hairs fall back from in front and fill openings of ears. Tail dis- 

 tinctly bicoloured, clothed with a mixture of rufous and black 

 hairs above, clear buffy ochraceous below. Feet thinly clothed 

 with buffy and dusky hairs. A small white throat patch marks 

 10 out of 29 specimens. Spot covering side glands inconspicuous. 



For external and cranial measurements, see table at end of 

 volume. 



1 N. Amer. Fauna, No. 24, 1904, p. 34. 



