a. — ereniicus. (/^///x), Allen, Bull. Amer. Mus. Nat. Hist., 1894, p. 347. 



Type locality. Fairbank, Arizona. 



Geogr. Distr. White Mountain region, southeastern Arizona. 



Genl. Char. "Similar to /,. iexianust (it-xensis), as restricted bj' 

 Dr. Mearns, but much smaller." 



Color. " No very obvious difference in coloration! " (Allen, 1. c.) 



Measurements. Total length, 565; tail vertebras, 74; hind foot, 

 123; ear from crown, 128. 



b.—^riseus. {Le/>us), Mearns, Proc. Nat. Mus. Wash., 1895, p. 562. 



Ty/ie locality. Fort Hancock, El Paso, Texas. 



Geogr. Distr. Upper Rio Grande from Maverick and Kinney 

 Counties, Te.xas to Grant County, New Mexico, and south into 

 Mexico. 



Genl. Char. Size about equal to /. californicus, ear larger. 



Color. Winter Pelage. Above brownish gray lined with black; 

 rump and thighs gray; sides gray lined sparsely with black and 

 tinged with yellowish brown; nape grayish white. Top of head 

 brownish gray mixed with black; sides of head and neck tinged with 

 yellowish brown; gular patch grayish clay color; rest of under parts 

 white; legs gray tinged with clay color. Tail, above black, this color 

 extending over and dividing the gray on the rump; beneath brownish; 

 ears brownish gray on outside anteriorly, with brownish white 

 fringes; posteriorly white tipped with black and fringed with white. 



Measurements. Total length, 559.2; tail vertebrae, 91.5; hind 

 foot, 127; ear from crown, 152.8. 



c. — de.ierticolits. {/.e/>us), Mearns, Proc. Nat. Mus. Wash., 1895, p. 564. 



Ty/re locality. Western edge of the Colorado Desert, at base of 

 Coast Range Mountains in San Diego County. California. 



Geogr. Distr. Desert region between the Sonoyta Valley of Ari- 

 zona and Sonora, and the Coast Range Mountains of California, and 

 Lower California. 



Genl. Char. Size of /,. californicus, with large ears, colors pale. 



Color. Above clay color mixed with gray and black, sides and 

 gular patch ochraceous; beneath tinged with ochraceous buff; ear 

 pale drab and white as usually seen, tipped with black on underside. 



Measurements. Total length, 560; tail vertebra-, no; hind foot, 

 125; ear from crown, 158. 



441. californicus. {l.cpus), Bachm., Journ. Acad. Phil., 1839, p. 86. 

 bennettii. Gray, Zool. Sulphur, 1844, p. 36, pi. 14. 

 richardsoni, Bachm., Journ. Acad. Nat. Scien. Phil., 1839, p. 88. 

 Type locality. San Diego, California. 



