ZYGODONTOMYS. 



KEY TO THE SPECIES. 



A. Upper parts yellowish brown and black Z. cherrii 253 



B. Upper parts mixed blackish brown and yellow- 

 ish rufous Z. chrysomelas 253 



C. Upper parts russet brown and dull ferrugineous . . Z. seorsus 254 



FIG. XL. ZYGODONTOMYS CHERRII. 

 CHERRIE'S RICE RAT. 



245. cherrii (Oryzomys), Allen, Bull. Am. Mus. Nat. Hist., 1895, 



P- 329- 

 CHERRIE'S RICE RAT. 



Type locality. Boruca, Costa Rica. 



Geogr. Distr. Costa Rica, Central America; range unknown. 



Genl. Char. Size medium; tail less than length of head and 

 body; pelage coarse. 



Color. Upper parts mixed yellowish brown and black, dorsal 

 line darkest; sides grayish brown, beneath grayish white; tail above 

 dusky brown, below grayish brown; feet and ears gray. 



Measurements. Total length, 214; tail vertebrae, 92; hind foot, 

 23; ear from crown, 12. Skull: total length, 30; basal length, 28; 

 zygomatic breadth, 16; interorbital constriction, 6; breadth of brain- 

 case, 13. (ex Type.) 



246. chrysomelas (Oryzomys}, Allen, Bull. Amer. Mus. Nat. Hist., 



l8 97> P- 37- 



caliginosus (Hesperomys), Allen, Bull. Amer. Mus. Nat. Hist., 

 1891, p. 210. (nee Tomes.) 



