ZYGODONTOMYS. 253 
KEY 10 TRE SPECIES. 
PAGE 
A. Upper parts yellowish brown and black.......... Z. cherri 253 
B. Upper parts mixed blackish brown and yellow- 
MME etre nts dt te eds BO, Z. chrysomelas 253 
5 
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, 
Pp. 329. 
CHERRIE’S Rice Rar. 
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 vertebre, 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., 
1897, P- 37- 
caliginosus (Hesperomys), Allen, Bull. Amer. Mus. Nat. Hist., 
1891I, p. 216.. (nec Tomes.) 
