194 PEROMYSCUS. 



10.4; palate, 4.2; postpalatal length, 10; length of upper molar series, 

 4.3; greatest diameter of audital bullae, 6.5. 



156. sagax (Pcromyscus), Elliot, Pub. Field Columb. Mus., in, 1903, 



p. 142. Zoology. 

 LA PALMA FIELD MOUSE. 



Type locality. La Palma, State of Michoacan, Mexico. 



Genl. Char. Similar in color to P. difficilis, Allen, but skull very 

 different; ears large; braincase broad, nearly square; interorbital 

 constriction considerable. Compared with that of P. difficilis, the 

 skull is shorter and narrower, with shorter nasals, but of about equal 

 width; bullae 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 vertebrae, 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., 1897, P- 8 - 

 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 vertebrae, 100; hind foot, 

 22; ear, 20. Skull: total length, 31; basal length, 25; interorbital 

 constriction, 5 ; length of nasals, 12. (ex Type.) 



ft. badius (Pcromyscus}, Osgood, Proc. Biol. Soc. Wash., xvn, 



1904, p. 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 



