210 PEROMYSCUS. 



LARGE-EARED FIELD MOUSE. 



Type locality. Mountains west of Oaxaca City, State of Oaxaca, 

 Mexico. 



Geogr. Distr. State of Oaxaca, Mexico; limits of range unknown. 



Genl. Char. Similar to P. megalops ; ears and bullae larger. 



Color. Above grayish brown, back blackish; cheeks and sides 

 washed with fulvous; under parts whitish; hands and feet whitish; 

 wrists and ankles dusky; tail above dusky, beneath whitish. 



Measurements. Total length, 288; tail vertebrae, 148; hind foot, 

 30. 



185. megalops (Peromyscus}, Merr., Proc. Biol. Soc. Wash., xn, 



1898, p. 119. 

 OZOLOTEPEC FIELD MOUSE. 



Type locality. Mountains near Ozolotepec, State of Oaxaca, 

 Mexico. 



Geogr. Distr. State of Oaxaca, Mexico; range unknown. 



Genl. Char. Size large ; ears short ; tail long. 



Color. Above mixed fulvous and black, darkest between ears 

 and on dorsal region; cheeks and sides of body salmon fulvous; 

 under parts whitish, breast tinged with salmon fulvous; hands 

 white ; wrists, ankles, and hind feet dusky. 



Measurements. Total length, 282; tail vertebrae, 150; hind foot, 



185a. melanocarpus (Peromyscus}, Osgood, Proc. Biol. Soc. Wash., 



xvii, 1904, p. 73. 

 BLACK-FOOTED MOUSE. 



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

 Altitude, 8,000 feet. 



Genl. Char. Similar to P. megalops, but smaller and darker; 

 hands blackish to digits. 



Color. Upper parts blackish and mummy brown, darkest on 

 middle of back; under parts blackish slate, washed with creamy 

 white; pectoral region cinnamon rufous; black line from nostril 

 through eye; tail blackish, slightly paler on under side; hands and 

 feet dusky brownish to base of toes. 



Measurements. Total length, 241; tail vertebrae, 125; hind foot, 

 27. Skull: greatest length, 31.6; Hensel, 24.3; zygomatic width, 

 15.2; length of nasals, 12; interorbital constriction, 5.4; length of 

 upper molar series, 5. 



185b. altilaneus (Peromyscus) , Osgood, Proc. Biol. Soc. Wash., xvn, 

 1904, p. 74. 



