PEROMYSCUS. 205 



176b. simulatus (Peromy sens') , Osgood, Proc. Biol. Soc. Wash. 



xvn, 1904, p. 72. 

 IMITATOR MOUSE. 



Type locality. Jico, State of Vera Cruz, Mexico. 



Genl. Char. Miniature of P. lophurus; tail long, hairy, crested; 

 audital bullae relatively large. 



Color. Like P. lophurus; tail brown, narrow line of white on under 

 surface. 



Measurements. Total length, 169; tail vertebrae, 87; hind foot, 

 21 ; ear from notch, 14.3. Skull: greatest length, 24.4; Hensel, 18; 

 zygomatic width, 12.5; interorbital constriction, 4.3; interparietal 

 8.2X3; length of nasals, 9; palate, 3.5; postpalatal length, 8; length 

 of upper molar series, 8.9. 



177. felipensis (Peromyscus) , Merr., Proc. Biol. Soc. Wash., xn, 



1898, p. 122. 

 SAN FELIPE FIELD MOUSE. 



Type locality. Cerro San Felipe, State of Oaxaca, Mexico. Alti- 

 tude, 10,200 feet. 



Geogr. Distr. State of Oaxaca, Mexico; range unknown. 



Genl. Char. Similar to P. difficilis, but larger and darker. 



Color. Above dusky gray, blackish on dorsal region; lips, sides 

 of nose, under parts, hands, and feet white; flanks grayish brown; 

 spot on breast salmon; orbital ring black; tail above brown, beneath 

 whitish. 



Measurements. Total length, 238; tail vertebras, 125; hind 

 foot, 27.5. 



177a. amplus (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvn, 



1904, p. 62. 

 CHUBBY MOUSE. 



Type locality. Coixtlahuaca, State of Oaxaca, Mexico. 



Genl. Char. Similar to P. felepensis, but paler. 



Color. Upper parts clay color, being a mixture of ochraceous 

 buff and dusky; lateral line ochraceous buff; forehead and orbital 

 region grayish; under parts creamy white; pectoral spot ochraceous 

 buff; tail above dusky brownish, beneath white; hands and feet 

 white; ankles dusky. 



Measurements. Average of ten adults: total length, 248 (235- 

 260); tail vertebrae, 136 (128-145); hind foot, 27 (26-28). Skull of 

 type: zygomatic width, 10.4; inttrorbital constriction, 4.5; interpa- 

 rietal, 10.4X3.7; length of nasals, 11.3; palate, 4.6; postpalatal 

 length, 10.2; upper molar series, 4.8. 



