130 PEROMYSCUS. 



i66. texensis. (/e.xanus.'. Hesperomys), Woodh., Proc. Acad. Nat. 

 Scien. Phil., 1853, p. 242. 



Type locality. Rio Grande near El Paso, Texas. 



Geogr. Distr. Texas, New Mexico, Oklahoma and Indian Ter- 

 ritories. 



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, 117; tail vertebrae, 53; hind foot, 

 44; ear, 9. 



a.—Jnedius. {Peromyscus), Mearns, Proc. U. S. Nat. Mus., 1895, 

 p. 446. 



Type locality. Nachoguero Valley, Lower California. 



Geogr. Distr. Southern and Lower California. 



Genl. Char. Paler than P. gambeli and smaller; ear larger; tail 

 shorter. 



Color. Above wood brown, darker on dorsal tract, mixed with 

 black, shading to russet on flanks; feet and under parts pure white; 

 tail above white on sides and beneath. 



Measurements. Total length, 160; tail vertebrae, 70: hind foot, 

 21 ; ear, 17. 



h.— dementis. {Peromyscus), Mearns, Proc. U. S. Nat. Mus. Wash., 

 1895, p. 446. 



Type locality. San Clemente Island, California. 



Geogr. Distr. From type locality only. 



Genl. Char. Much blacker than P. t. medius, and of a more red- 

 dish coloration, save on the head. 



Color. Top of head drab gray; upper parts drab tinged with 

 burnt umber; ears black; feet and under surface white; tail bicolor. 



Measurements. Total length, 177; tail vertebra?, 77; hind foot. 

 21; ear 17. 



c. — (Sanibeli. {Hesperomys), Baird, N. Am. Mamm., 1857. p. 464. 



Type locality. Monterey, California. 



Geogr. Distr. California, Nevada. Oregon and Washington. 



Genl, Char. Ears large; tail shorter than body. 



Color. Above yellowish brown; flanks paler; under parts and 

 feet white; tail bicolor; dusky above, white below. 



Measurements. Total length, 163; tail vertebrae, 77; hind foot, iS. 



d .—nebracensis. {Hesperomys), Mearns, Bull. Am. Mus. Nat. Hist., 

 1890, p. 287. 

 T\pe locality. Custer County, Montana. 



