128 PEROMYSCUS. 



Geogr. Distr. Mountains of Arizona, White, Chiricahua and 

 Graham Ranges. 



Genl. Char. Similar to P. gain/'eli, but smaller, longer ears and 

 shorter tail. 



Color. Above dark plumbeous slate; below whitish. Tail bi- 

 color. 



Measurements. Totallength, 158; tail vertebra;, 67; hind foot, 24. 



e.—artemesiae. {Si/omys). Rhoads, Proc. Acad. Nat. Scien. Phil., 



1894, p. 260. 



Type locality. Ashcroft, British Columbia. 



Geogr. Distr. Southern Idaho, Western Washington and Ore- 

 gon to British Columbia. 



Genl. Char. Size large. Tail short, hardly equaling body 

 without head. Ears medium. 



Color, .\bove tawny ash, darkest on median line and inclining 

 to fulvous on sides and rump. Under parts white; tail, above sooty, 

 beneath white. 



Measurements. Total length, 170; tail vertebrae, 70; hind foot, 20. 



159. tornillo. {Peromysius), Mearns, Proc. U. S. Nat. Mus. Wash., 



1895, p. 445. 



Type locality. Rio Grande si.x miles above El Paso, Texas. 



Geogr. Distr. Northern Texas, range not known. 



Genl. Char. " Similar to P. a. arizome, but paler, ears smaller, 

 body stouter. " (Mearns, 1. c.) 



Color. Above light broccoli brown; feet and under parts pure 

 white; tail bicolor. 



Measurements. Total length, 192; tail vertebra;, 90; hind foot, 

 23; ear, 12. 



160. rufinus. [Hesperomys), Merr., N. Am. Faun., No. 3, 1890, p. 65, 



pl- 3- 



Type locality. San Francisco Mountain, Arizona. 



Geogr. Distr. Northwestern Arizona to New Mexico, Utah and 

 Colorado. 



Genl. Char. Similar to P. amcricanus, but with larger ears and 

 shorter tail. 



Color. Above tawny brown, darkest on dorsal region; flanks 

 brighter brown; remaining parts white. Tail dusky above, whitish 

 below. 



Measurements. Total length, 168; tail vertebra?, 69; hind foot, 19. 



161. gossypinus. {Hesperomys), Le Conte, Proc. .\cad. Nat. Scien. 



Phil., 1853, p. 411. 



