PEROMYSCUS, LOD 
yellow; tail above blackish brown, beneath yellowish white blotched 
with dusky; hands and feet white. 
Measurements. Total length, 193.4; tail vertebra, 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., 
5905p. 155. 
AsHy Gray Fietp Mouse. 
Type locality. San Roque Island, Lower California, Mexico, 
Geogr. Distr. Known 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 vertebra, 83; hind foot, 
21. Skull: total length, 27.5; basal 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. 123. 
Mount Mauincue 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; 
bulla 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 vertebra, 102; hind foot, 
aa: 
160. boylii (Hesperomys), Baird, Proc. Acad. Nat. Scien. Phil., 
1855, P-. 335. 
gilbertt, Allen, Bull. Am. Mus. Nat. Hist., 1893, p. 188. 
boylti (Peromyscus), Elliot, Syn. N. Am. Mamm., rgot, p. 132. 
BoyLr’s Mousp. 
Type locality. Middle fork of American River, Eldorado County, 
California. ' 
Geogr. Distr. WLower California, Mexico, north to California. 
