186 PEROMYSCUS. 



Geogr. Distr. States of Sonora and Chihuahua, Mexico, north 

 into New Mexico. 



Genl. Char. Small; tail longer than head and body; ears large; 

 soles naked. 



Color. Above ash gray, lined with black; sides buffy fulvous; 

 under parts white; tail above dark brown, beneath whitish. 



Measurements. Total length, 144; tail vertebrae, 80; hind foot, 

 18.5; ear, 12. Skull: basilar length, 20.3; Hensel, 18; zygomatic 

 width, 12.8; interorbital constriction, 3.9; length of nasals, 7.8; 

 length of upper molar series, 3.8; length of mandible, 12.9. 



146a. goldmani (Peromyscus) , Osgood, Proc. Biol. Soc. Wash., xvn, 



1904, p. 75. 

 GOLDMAN'S MOUSE. 



Type locality. Alamos, State of Sonora, Mexico. 



Genl. Char. Similar to P. anthonyi; tail long, hairy; heel slightly 

 hairy. 



Color. Upper parts and sides ochraceous buff mixed with black; 

 under parts creamy white; pectoral spot buff. 



Measurements. Total length, 217; tail vertebras, 117; hind foot, 

 24. Skull: greatest length, 27.3; Hensel, 21.1; zygomatic width, 14.2; 

 interorbital constriction, 4; interparietal, 8.6x3.2; length of nasals, 

 9.6; palate, 4.2 ; postpalatal length, 10; length of upper molar series, 4. 



147. texensis (Hesperomys), Woodh., Proc. Acad. Nat. Scien. Phil., 

 1853, p. 242. 



texensis (Peromyscus), Elliot, Syn. N. Am. Mamm., 1901, p. 130. 

 TEXAN FIELD MOUSE. 



Type locality. Rio Grande near El Paso, El Paso County, Texas. 



Geogr. Distr. Southern Texas, into State of Chihuahua, Mexico. 



Genl. Char. Small; tail equal to head and body; ears small. 



Color. Above cinereous mixed with pale brown; lower sides, feet 

 and under parts white; tail above brown, beneath white. 



Measurements. Total length, 106.6; tail vertebrae, 53.3; hind foot, 

 44; ear, 10. Skull: occipito-nasal length, 23; Hensel, 17.5; zygo- 

 matic width, 12; interorbital constriction, 3.5; length of nasals, 7.5; 

 palatal length, 9.5. 



a. arizonce. 



americanus arizonce (Sitomys), Allen, Bull. Am. Mus. Nat. Hist., 



1894, p. 321. 

 americanus arizonce (Peromyscus}, Elliot, Syn. N. Am. Mamm., 



1901, p. 125. 

 ARIZONA FIELD MOUSE. 



Type locality. Fairbank, Cochise County, Arizona. 



