PEROMYSCUS. 195 
yellow; tail above blackish brown, beneath yellowish white blotched 
with dusky; hands and feet white. 
Measurements. Total length, 193.4; tail vertebre, 96.7; hind foot, 
23.5. Skull: greatest length, 28.2; Hensel, 20.7; zygomatic width, 
14.1; interorbital constriction, 4.7; interparietal, 9.23.1; length of 
nasals, 10.4; palate, 4.2; postpalatal length, 9.9; length of upper 
molar series, 4.1. 
158. cineritius (Peromyscus), Allen, Bull. Am. Mus. Nat. Hist., 
1898, p. 155. 
AsHy Gray FIELD MOUSE. 
Type locality. San Roque Island, Lower California, Mexico. 
Geogr. Distr. KKKnown only from type locality. 
Genl. Char. Size large, colors pale. 
Color. Above ash gray tinged with fulvous, with black hairs 
intermixed; under parts white; hands and feet white; tail above 
brown, sides and beneath whitish. 
Measurements. Total length, 191; tail vertebre, 83; hind foot, 
21. Skull: total length, 27.5; basa! length, 23; mastoid breadth, 11; 
interorbital width, 3.3; length of nasals, 9.5. (ex Type.) 
159. levipes (Peromyscus), Merr., Proc. Biol. Soc. Wash., x11, 1898, 
p.0r33. 
Mount MALINCHE MOUSE. 
Type locality. Mount Malinche, State of Tlaxcala, Mexico. Alti- 
tude, 8,400 feet. 
Geogr. Distr. State of Tlaxcala, Mexico; range unknown. 
Genl. Char. Size small; ears large; tail longer than head and 
body. Similar to P. gratus, but rostrum heavier, nasals longer; 
bullz smaller. 
Color. Above grayish brown; sides and cheeks buffy fulvous; 
under parts, hands, and feet white; salmon spot on breast; tail above 
dusky, beneath whitish. 
Measurements. Total length, 200; tail vertebre, 102; hind foot, 
aa.5. 
160. boylii (Hesperomys), Baird, Proc. Acad. Nat. Scien. Phil., 
1855, P- 335; 
gtlberti, Allen, Bull. Am. Mus. Nat. Hist., 1893, p. 188. 
boylit (Peromyscus), Elliot, Syn. N. Am. Mamm., 1901, p. 132. 
BoyLe’s Mouse. 
Type locality. Middle fork of American River, Eldorado County, 
California. 
Geogr. Distr. Lower California, Mexico, north to California. 
