PEROMYSCUS. 1197 
Geogr. Distr. State of Mexico, range unknown. 
Genl. Char. Size small; ears large; similar to P. trudt. 
Color. Above pale buffy fulvous and black; side buffy fulvous; 
under parts white as are also the hands and feet; tail dusky, the 
sides slightly paler. 
Measurements. Total length, 209; tail vertebre, 114; hind foot, 23. 
a.—gentilis (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvit, 
HOGA, DP. O61. 
FoREIGN MOusE. 
Type locality. Lagos, State of Jalisco, Mexico. 
Genl. Char. Similar to P. gratus, but paler; molars slightly 
smaller. 
Color. Upper parts pale ochraceous buff and dusky; sides of head 
ochraceous buff; under parts white; tail above blackish, beneath 
white; hands and feet white; ankles dusky. 
Measurements. Total length, 194-210; tail vertebrae, 103-120; 
hind foot, 23-24.5. Skull: greatest length, 27.2; zygomatic width, 
14; length of nasals, 9.5; interorbital constriction, 4.4; length of 
upper molar series, 4. 
162. pavidus (Peromyscus), Elliot, Pub. Field Columb. Mus., 111, 
1903, p. 142. Zodlogy. 
SHy FieLtp Mouse. 
Type locality. Patzcuaro, State of Michoacan, Mexico. 
Genl. Char. Tail long, ears large, colors dark. Skull with very 
broad braincase, mastoid width being apparently the greatest; 
rostrum long and rather slender, its greatest width being less than 
the least interorbital width, the palatine foramina broad, their 
posterior ends just reaching the anterior line of the first premolar. 
Skulls of all the specimens are badly broken. Somewhat similar to 
P. gratus in color, but larger in all its dimensions. 
Color. Upper parts mixed buff and brownish black, palest on 
hind neck; orbital ring black; lateral line from lip to rump ochraceous 
buff, sides buff; under parts white, tinged with buff on chest; arms 
buff; legs and ankles dusky; hands and feet white; tail above blackish 
or brownish black, beneath white; ears brown. 
Measurements. Total length, 238; tail vertebrz, 130; hind foot, 23. 
163. madrensis (Peromyscus), Merr., Proc. Biol. Soc. Wash., x1 
1898, p. 16. 
Marta Mapre Istanp Mouse. 
Type locality. Maria Madre Island, Tres Marias Islands, State of 
Jalisco, Mexico. 
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