EVOTOMYS 273 



For external and cranial measurements, see table at end of 

 volume. 



Remarks.- — Readily distinguished from all other Eastern forms 

 by its larger size and darker coloration. Specimens in the same 

 pelage should be used for comjjarison, as the lightest jjhase of 

 winter pelage in E. carolivensis matches the darkest summer 

 phase of E. gapperi. 



31. Evotomys limitis Bailey. 

 1913. Evotomys limitis Bailey, Proc. Biol. See. Wcashington, 26, p. 133 ; 

 Miller, " List," 1924, p. 203. 



Type.—U.'f^. Nat. Mus., No. 141335 ; adult male, collected 

 October 27, 1906, by V. Bailey. 



Type locality. — Willow Creek, a branch of the Gilita, MogoUon 

 Mountains, Socorro County, New Mexico. Altitude 8500 feet. 



C/ta;-ac?ens\— Compared with E. gapperi galei, size slightly 

 larger (hind-foot 20 mm. ; basal length of skull 24-5 mm.) ; 

 colour duller, greyer and less buffy ; skull and dentition heavier. 



Winter pelage with chestnut dorsal area less extensive ; 

 general colour less yellowish and greyer ; sides, face, and feet 

 clear grey ; belly whitish ; tail bicoloured, whitish below, dark 

 grey above, its pencil blackish. Summer pelage much darker 

 chestnut, with dark grey sides and face. 



Skull larger, heavier, and conspicuously more ridged ; auditory 

 bullae large and especially deep. Dentition heavy throughout. 



For external and cranial measurements, see table at end of 

 volume. 



32. Evotomys ungava Bailey. 

 1897. Evotomys ungava Bailey, Proc. Biol. See. Washington, 11, p. 

 130; MiUer, " List," 1912, p. 212; " List," 1924, p. 403. 



Type.—V.^. Nat. Mus., No. |f||, Merriam Coll.; adult 

 male, collected May 12, 1883, by L. M. Turner. 



Type locality. — Fort Chimo, Ungava, Canada. 



Characters. — Size as in E. gapperi; tail and feet slender; ears 

 very small, not projecting beyond fur. 



Colour dull (skinned from spirit). Mantle not sharply defined, 

 dull brownish-chestnut; sides and face bu£Ey grey, finely lined 

 with blackish hairs ; belly dark plumbeous, heavily washed with 

 buffy. Feet dusky grey. Tail indistinctly bicoloured, brownish 

 above, soiled buffy below. 



Skull compared with that of E. gapperi long and slender ; brain- 

 case narrower; zygomata less spreading; rostrum longer and 

 straighter; lateral bridges of palate incomplete. Auditory 

 bullae longer, flatter and less rounded. Incisors slender. Enamel 

 pattern normal. 



Remarks. — Type alone known. 



For external and cranial measurements, see table at end of 

 volume. 



