PEROMYSCUS. 207 
181. mexicanus (Hesperomys), Sauss., Rev. Mag. Zodl., 1860, 2me 
Sér., p. 103, pl. 1x, figs:.1. ia. 
Mexican Mouse. 
Type locality. State of Vera Cruz, Mexico. 
Genl. Char. Size large; ears large, longer than wide; tail long. 
Color. Above dark brownish mouse gray; silvery shade on back; 
flanks yellowish gray; cheeks rusty gray; lips and chin yellowish 
gray; under parts grayish white, with a yellow wash on breast; 
hands white; hind feet brown; toes white; tail black above, white 
beneath. 
Measurements. Total length, 180; tail vertebre, 78; hind foot, 26. 
a.—teapensis (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvi, 
1904, p. 69. 
Teapa Mouse. 
Type locality. Teapa, State of Tabasco, Mexico. 
Genl. Char. Similar to P. m. totontepecus, but sides brighter. 
Color. Dorsal region blackish; sides chestnut; orbital ring black; 
under parts creamy white; pectoral spot often present; tail black, 
with a few yellowish white spots beneath; hands white; feet white, 
with a dusky area from ankles nearly to base of toes. 
Measurements. Total length, 234-254; tail vertebre, 121-136; 
hind foot, 27—28.5. Skull: greatest length, 33; Hensel, 24.6; zygo- 
matic width, 16.2; length of nasals, 12.7; interorbital constriction, 
5-4; palate, 4.7; postpalatal length, 11.9; length of upper molar series, 
4.5. 
b.—orizabe (Peromyscus), Merr., Proc. Biol. Soc. Wash., xu, 1898, 
Po ae: 
OrizaBA FieLp Mouse. 
Type locality. Orizaba, State of Vera Cruz, Mexico. Altitude, 
4,200 feet. 
Geogr. Distr. State of Vera Cruz, Mexico; range unknown. 
Genl. Char. Similar to P. mexicanus, but larger; tail and hind 
feet longer. 
Color. Top of head and upper parts dark seal brown; sides and 
cheeks chestnut fulvous; orbital ring and nose dusky; lips, under 
parts, wrists, and hands white; salmon tinge on breast; hind feet 
basally dusky, rest whitish; tail above dusky, beneath yellowish white. 
Measurements. Total length, 257; tail vertebre, 139; hind 
foot, 29.5. 
e.—saxatilis (Peromyscus), Merr., Proc. Biol. Soc. Wash., x11, 1898, 
Dp. Let. 
