MICROTUS. 



305 



306. umbrosus (Microtus), Merr., Proc. Biol. Soc. Wash., xn, 1898, 



p. 10J. / 



MOUNT ZEMPOALTEPEC MEADOW VOLE. 



Type locality. Mt. Zempoaltepec, State of Oaxaca, Mexico. 

 Altitude, 8,200 feet. 



Geogr. Distr. State of Oaxaca, Mexico. 



Genl. Char. Size rather large; tail long; ear short; color dark. 



Color. Above dusky, mixed with brown; under parts slate, 

 tinged with fulvous. 



Measurements. Total length, 184; tail vertebrae, 65; hind foot, 

 23. Skull: occipito-nasal length, 28; Hensel, 24.5; zygomatic width, 



FIG. 54. MICROTUS (HERPETOMYS) GUATEMALENSIS. 



No. 76793 U. 5. Nat. Mus. Coll. Twice nat. size. 



UPPER TOOTH ROW. LOWER TOOTH ROW. 



Enlarged 6 times. Enlarged 6 times 



