MEGADONTOMYS. 





FIG. 34. MEGADONTOMYS THOMASI. 



No. 70144 U. S. Nat. Mus. Coll. Twice nat. size. 



UPPER TOOTH ROW. LOWER TOOTH ROW. 



Enlarged 7 times. Enlarged 7 times. 



189. thomasi (Peromyscus), Merr., Proc. Biol. Soc. Wash., xn, 



1898, p. 116. 

 THOMAS' GUERRERO FIELD MOUSE. 



Type locality. 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 



