138 PEROMYSCUS. 



feet very short; nasals wide and bluntly edged between the nasal 

 premaxillary processes. 



Color. Above uniform grayish ochre; under parts and feet 

 white. Tail dusky above, white below. 



Measurements. Total length, 158; tail vertebra', 76; hind foot, 

 19.3; ear, 12. 



181. fraterculu.c. {Vesperimus), Miller, Amer. Nat., 1892, p. 261. 

 Type locality. Dulzura, San Diego, California. 



Geogr. Distr. Southern California, range not determined. 



Genl. Char. Size medium; tail longer than head and body, 

 thinly haired; soles naked; ears large. 



Color. Above yellowish wood brown mixed with black, darkest 

 on median line; flanks fulvous with distinct lateral stripe; feet white; 

 under parts yellowish white with fulvous pectoral spot. Tail, above 

 brownish, paler beneath. 



Measurements. Total length, 185; tail vertebrae, 113; hind foot, 

 20; ear, 18. 



182. eremicus. {Besperomys), Baird, Mamm., N. Am., 1857, p. 479. 

 Type locality. Colorado Desert. 



Geogr. Distr. New Mexico, Arizona and California. 



Genl. Char. Ears very large; tail longer than the head and 

 body; palms and soles naked. 



Color. Above pale yellowish gray, mixed with black; pale ful- 

 vous band on cheeks and sides. Tail, obscurely bicolor, above little 

 darker than dorsal region. Feet whitish. 



Measurements. Total length, 190; tail vertebra;, 96.5; hind foot, 

 22; ear, 19. 



o. — arenariuK. [Feromyscus), Mearns, Proc. U.S.Nat. Mus. Wash, 

 1896, p. 138. 



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



Geogr. Distr. Northern Texas, limits of range unknown. 



Genl. Char. Similar to P. eremicus, without dark, dorsai line. 



Color. Above and sides pale ochraceous drab mixed with black; 

 tail above dusky drab and hoary, below pure white. Head grayish; 

 orbital ring dusky. 



Measurements. Total length, 198; tail vertebra?, 106; hind foot, 

 21.5; ear, 15. 



183. Stephens!. {Peromyscus), Mearns, Proc. U. S. Nat. Mus., 1897, 



p. 72. 

 Type locality. San Diego County, California, near Mexican 

 boundary. 



