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 bulle 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 vertebra, 148; hind foot, 
30. 
185. megalops (Peromyscus), Merr., Proc. Biol. Soc. Wash., x11, 
1898, p. 119. 
OzoLoTEPEec FiELpD 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 vertebre, 150; hind foot, 
gilt 
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 vertebre, 125; hind foot, 
27. Skull: greatest length, 31.6; Hensel, 24.3; zygomatic width, 
ts.2; length of nasals, 12; interorbital constriction, 5.4; length of 
upper molar series, 5. : 
185b. altilaneus (Peromyscus), Osgood, Proc. Biol. Soc. Wash., XvI, 
1904, Pp. 74. 
