EVOTOMTS 263 



24. Evotomys phaeus Swarth. 



1911. Emfovn/s plmus Swarth, Univ. Calif. Publ. Zool., 7, p. 127; 

 Miller, " List," 1912, p. 210; " List," 1924, p. 401. 



Type. — ^University of California Museum Vert. Zool., No. 

 8742; adult male; collected June 13, 1909, by H. S. Swarth. 



Type locality. — -Marten Arm, Boca de Quadra, Alaska. 



Range. — Coast of Alaska; known from Boca de Quadra, 

 Chickmain River, and Bradtield Canal. 



Characters. — Size large (hind-foot 19-20 mm. ; skull length 

 23-25-5 mm.), tail long, about half the length of head and 

 body. 



Colour dark ; mantle not very sharply defined laterally, dark 

 brown, between chestnut and walnut brown; sides and cheeks 

 dark Isabella colour; under surface grey (about No. 8), sharply 

 defined from flanks. Fairly conspicuous oval patches of grey 

 hair over the hip glands. Tail bicoloured, brownish above, 

 yellowish below. 



Skull short and broad, with wide-spreading zygomata ; 

 rostrum short ; premaxillse usually extending backwards slightly 

 beyond nasals ; frontals depressed. 



For external and cranial measurements, see table at end of 

 volume. 



Remarks. — Distinguished from its nearest neighbours (1) 

 E. wrangeli by cranial characters and much longer tail ; (2) E. 

 caurinus by larger size and longer tail. 



25. Evotomys wrangeli Bailey. 



1897. Emiomi/s wrangeli Baile.y, Proc. Biol. See. Washington, 11, 

 p. 120; Miller, " List," 1912, p. 209; " List," 1924, p. 401. 



Type.—V.S. Nat. Mus., No. 74724 (Biol. Surv. Coll.); adult 

 female, collected Sept. 1, 1895, by C. P. Streator. 



Type locality. — Wrangel, Wraugel Island, Alaska. 



Range. — Wrangel and Revillagigedo Islands, Southern Alaska. 



Characters. — Size large (hind-foot 20 mm. ; basal length of 

 skull 24-3 mm.) ; tail short, rarely twice as long as hind-foot. 

 Fur thick and long in both young and adults collected early in 

 September. Ears well-clothed with short hairs, distinctly rufous 

 tipped. Sides glands well developed in one specimen of a series 

 of eighteen. 



Colour dull. Mantle dull dark chestnut with a liver-brown 

 tone, covering whole back from eyes to base of tail, and shading 

 gradually into the sepia grey of the sides and cheeks. Sides 

 more or less suffused with bufTy yellowish ; belly dark plumbeous, 

 washed with whitish or buffy ochraceous. Projecting part of 

 ear and tuft of long hair in front of ear concolorous with back ; 

 no post-auricular spot. Feet dusky grey in adults, sooty in 

 young. Tail bicoloured, blackish above, soiled buffy below; 



