Mearns Mainland Forms of Eastern Deermouse. 155 



Characters. Form stout; ears small, hairy on anterior half of outer 

 surface: color decidedly paler than in the eastern forms; a whitish tuft, 

 in winter, at anterior base of ear; pelage intermediate in length between 

 the two eastern forms; skull as in the typical form. 



Color in summer. Upperparts light bistre, sparingly lined with black 

 hairs; ears with outer surface sepia, hairy anteriorly and almost naked 

 posteriorly, thinly coated with grayish hairs on inner surface, and faint 

 ly hoary on edge; feet and tail so scantily clothed that the skin and an- 

 nuli are visible between the hairs; tail slightly penciled; gray of under.- 

 parts partially concealed by white-tipped hairs. 



In winter the upperparts are cinnamon, coarsely but sparsely lined with 

 black; ears light brown instead of sepia, with a slight tuft of whitish 

 hair at the base anteriorly, and with faint hoary rims; underparts white, 

 the gray underfur being concealed; feet and tail moderately hairy, the 

 latter slightly penciled. 



Young mouse-gray above, grayish white below: ears slate-black on 

 anterior band, grayish posteriorly, very faintly edged with hoary; tail 

 hair-brow above, white below. 



Measurements. Length, 175 mm.; tail vertebra 1 , 75; hind foot, 21.5; 

 ear above crown, 11.5. 



