268 MICROTIN^ 



braincase and rostrum is a little greater, the distances between the 

 condyle and m^, and the condyle and front face of the bulla, 

 together with the diastema and nasals, are rather longer, and the 

 tooth-rows are distinctly shorter relatively than in E. g. britannicus. 

 Such differences, however, are scarcely of more than subspecific 

 value. 



Cheek-teeth normal; m^ usually more complex than in E. 

 (jlareolus, the third inner fold and fourth inner angle well developed ; 

 the third outer fold is sometimes shallow and sometimes well 

 developed, the fourth outer salient angle being correspondingly 

 variable ; occasionally in young adults there is a fourth inner fold 

 and still more rarely traces of a fourth outer valley and fifth 

 outer angle — the last quite vestigial. 



For external and cranial measurements, see tables at end of 

 volume. 



286. Evotomys gapperi ochraceus Miller. 

 1894. Evotomys gapperi ochraceus Miller, Proc. Boston Sec. Nat. Hist., 

 26, p. 193 ; Bailey, Proc. Biol. Soc. Washington, 11, p. 124, 1897 ; 

 Miller, " List," 1912, p. 211; " List," 1924, p. 402. 



Type.— EM., No. 7.7.7.2533; adult female (Miller Coll.). 



Type locality. — Mount Washington, Coos County, New 

 Hampshire. Altitude 5500 feet. 



Range. — The White Mountains of New Hampshire and 

 (probably eastward to) Nova Scotia. 



Characters. — Like the typical form, but slightly larger (hind- 

 foot 19 mm. ; condylo-basal length of skull to 23'7 mm.), much 

 duller and paler, with long lax fur. 



Mantle faintly defined, pale dull rusty rufous, with no black 

 hairs. Sides buffy. Under parts plumbeous, lightly washed with 

 dirty white. Feet grey. Tail brownish above, buffy below; 

 the upper surface of the pencil blackish. Bars well haired, their 

 upper edges pale fulvous. 



Skull and teeth nearly as in the typical form. The oldest 

 among seventeen skulls in the Miller Collection examined by me 

 (twelve from Mount Washington, five from Digby, Nova Scotia) 

 have the pterygoid fossae and nasals relatively a little shorter 

 than in equal-aged skulls of E. g. gapperi. 



For external and cranial measurements y^ see tables at end of 

 volume. 



28c. Evotomys gapperi rhoadsii Stone. 



1893. Evotomys gapperi rhoadsii Stone, Amer. Nat., 27, p. 55; Bailey, 

 Proc. Biol. Soc. Washington, 11, p. 125, 1897; Miller, "List," 

 1912, p. 211; " List," 1924, p. 402. 



Type. — Stone Collection No. 160; adult male, collected i 

 December 2, 1892. 



Type locality. — May's Landing, Atlantic County, New Jersey. 



