340 THOMOMYS. 



and region around mouth dusky; feet whitish, but brown of hind 

 leg coming well down over ankle and covering part of foot." (Merr. 

 I.e.) 



Measurements. Total length, 196; tail vertebrae, 60; hind foot, 28. 



346. cervinus (Thomomys), Allen, Bull. Amer. Mus. Nat Hist., 1895, 



p. 203, fig. i. Elliot, Syn. N. Am. Mamm., 1901, p. 230. 

 CERVINE POCKET GOPHER. 



Type locality. Phoenix, Maricopa County, Arizona. 



Geogr. Distr. State of Sonora, Mexico, to southern Arizona. 



Genl. Char. Size large; color pale; rostrum broad, heavy; skull 

 large. 



Color. Above fawn, obscured on dorsal region with dusky; 

 beneath gray, base of hair plumbeous; blackish area about ears; 

 pouches inside white; feet whitish; tail above grayish fawn, paler 

 beneath. 



Measurements. Total length, 228; tail vertebrae, 63; hind foot, 

 28. Skull: occipito-nasal length, 44; Hensel, 38; zygomatic width, 

 26.5; interorbital width, 7; mastoid breadth, 20; median length of 

 nasals, 13; lateral length of nasals, 10; width of nasals anteriorly, 5. 



347. perpallidus (Thomomys), Merr., Scien., vin, 1886, p. 588. 



Elliot, Syn. N. Am. Mamm., 1901, p. 229. 

 PALE POCKET GOPHER. 



Type locality. Colorado Desert, San Diego County, southern 

 California. 



Geogr. Distr. Lower California, Mexico, Colorado Desert, southern 

 California, and northeastward to the Painted Desert, Arizona. 



Genl. Char. Similar to T. clusius (Coues, Proc. Acad. Nat. Scien. 

 Phil., 1875, p. 138, Ex. Bridger's Pass., Rocky Mts.),but tail longer, 

 half the length of head and body; color pale. 



Color. Above pale brownish yellow; sides yellowish white; 

 beneath white; feet white; tail white for two-thirds the length, tip 

 blackish. 



Measurements. Total length, 228; tail vertebrae, 76; hind foot, 

 52. Skull: occipito-nasal length, 38; Hensel, 33; zygomatic width, 

 23; interorbital width, 7; mastoid width, 19.5; median length of 

 nasals, 12; length of upper molar series, 7; length of mandible, 25. 



The Kangaroo Rats, as their name implies, are remarkable for 

 the great length of their hind legs and tail, and they progress by 

 long leaps exactly similar to those of the animal from which they 



