PEROMYSCUS. 195 



yellow; tail above blackish brown, beneath yellowish white blotched 

 with dusky; hands and feet white. 



Measurements. Total length, 193.4; tail vertebrae, 96.7 ; hind foot, 

 23.5. Skull: greatest length, 28.2; Hensel, 20.7; zygomatic width, 

 14.1; interorbital constriction, 4.7; interparietal, 9.2X3.1; 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. 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 vertebras, 83; hind foot, 

 21. Skull: total length, 27.5; basal length, 23; mastoid breadth, n; 

 interorbital width, 3.3; length of nasals, 9.5. (ex Type.) 



159. levipes (Peromyscus), Merr., Proc. Biol. Soc. Wash., xn, 1898, 



p. 123. 

 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. grains, but rostrum heavier, nasals longer; 

 bulls 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 vertebrae, 102; hind foot, 

 23-5- 



160. boylii (Hesperomys), Baird, Proc. Acad. Nat. Scien. Phil., 



l8 5S.P- 335- 



gilberti, Allen, Bull. Am. Mus. Nat. Hist., 1893, p. 188. 



boylii (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. 



