194 PEROMYSCUS. 
10.4; palate, 4.2; postpalatal length, 10; length of upper molar series, 
4.3; greatest diameter of audital bulle, 6.5. 
156. sagax (Peromyscus), Elliot, Pub. Field Columb. Mus., 111, 1903, 
p. 142. Zodlogy. 
La Pautma Firetp Mouse. 
Type locahity. La Palma, State of Michoacan, Mexico. 
Genl. Char. Similar in color to P. dtfficilis, Allen, but skull very 
different; ears large; braincase broad, nearly square; interorbital 
constriction considerable. Compared with that of P. dzijficilis, the 
skull is shorter and narrower, with shorter nasals, but of about equal 
width; bulle smaller and closer together, and molars much smaller. 
Color. Top of head and dorsal region mixed grayish black and 
buff, the former predominating; sides grayish brown and buff, with 
an indistinct buff lateral line; orbital ring and spot behind nose 
black, with a buff spot between this and the eye; sides of head and 
shoulders buffy gray; under parts white; upper side of arms buffy 
gray; thighs like sides; hands and feet white; tail black above, white 
beneath; ears large, brown at base, blackish at tip, with narrow white 
edges. 
Measurements. Total length, 192; tail vertebra, 107; hind foot, 
22. Skull: total length, 26; Hensel, 20; zygomatic width, 13; mastoid 
width, 12; length of nasals, 10; greatest width of rostrum, 4; palatal 
length, 4; interorbital constriction, 4.3; length of upper molar series, 4. 
157. yucatanicus (Peromyscus), Allen & Chapman, Bull. Amer. 
Mus. Nat. Hist:, 1807; p. 3: 
Yucatan Mouse. 
Type locality. Chichen Itza, Yucatan, Mexico. 
Geogr. Distr. Yucatan, Mexico. 
Genl. Char. Tail naked; size medium. 
Color. Above fulvous mixed with black; lateral line bright 
fulvous; under parts white; outer surface of limbs like back; hands 
and feet white; tail naked, unicolor, brown; ears brownish. 
Measurements. Total length, 210; tail vertebre, 100; hind foot, 
22; ear, 20. Skull: total length, 31; basal length, 25; interorbital 
constriction, 5; length of nasals,12. (ex Type.) 
a.—badius (Peromyscus), Osgood, Proc. Biol. Soc. Wash., XvIl, 
L904; Pp. 70. 
ApAZOTE MOUSE. 
Type locality. Apazote, State of Campeche, Mexico. 
Genl. Char. Similar to P. yucatanicus, but darker. 
Color. Dorsal area and sides strongly mixed with black; lateral 
line cinnamon rufous; orbital ring black; under parts suffused with 
