MEGADONTOMYS. 
Fic. 34. MEGADONTOMYS TH‘ 
No. 70144 U.S. Nat. Mus. C Tw 
UPPER OTH |} 
I nlarged 7 times En 
189. thomasi (Peromyscus), Merr., Proc. Biol. 
1595, Dp. rrO- 
THOMAS’ GUERRERO FIELD MOUSE. 
Type locality 
ype ty. Mountains near Chilpancingo, State of Guerrero, 
Mexico. Altitude, 9,700 feet. 
Geogr. Distr. State of Guerrero, Mexico; range unknown. 
Genl. Char. Size large; tail very long; ears large, both nearly 
, 
naked. 
Color. Above fulvous, mixed with black on back; beneath 
white; breast sometimes tinged with yellowish buff; orbital ring 
