1914.] 



BEITHKODONTOMYS MEGALOTIS GROUP. 



27 



Characters. —Size medium (larger than R. montanus and smaller 

 than R. f. fulvescens) ; general tone brownish buff above and white 

 below; ears usually without dark markings. 



lao" 25° ieo° 115* no" ro5* lOo" 95° eo* 



lis' no" I05° lOO* 95" SO" 



Fig. 2.— Distribution of Eeithrodontomys montanus, R. megalotis, and subspecies. 



Color. — Unworn winter pelage: Upperparts mixed blackish brown 

 and light ochraceous-buff; darkest in middle of back, shading to 

 nearly pure buff on sides; feet and underparts white; tail hair-brown 

 above, whitish below; ears drab, usually with a tuft of ochraceous- 

 buff hairs at base. Unworn summer pelage: Similar to the fresh 



