DIPODOMYS. 235 



Color. Above like D. deserti, inclining to cinnamon on rump; 

 beneath white. Tail, upper fourth dark ashy extending to tip; 

 brownish black on middle third of under side. Feet white, soles 

 slighth' darker. 



Measurements. Total length, 241; tail vertebra', 149; hind foot, 

 38; ear from crown, 9; pencil, 35. Skull: basilar length, 21.8; mas- 

 toid breadth, 24; interorbital constriction, 14.5; nasals, 13; mandible 

 to base of incisors, 13.8; coronoid process from angle, 5.6. 



353. deserti. {DipoJoniys), Steph., Am. Nat., 1887, p. 42, pi. v. 

 Ty/^e locality. Mojave River, near San Bernardino Mountains, 



California. 



Cieox^r. Distr. Mojave and Colorado Deserts, southeastern Cali- 

 fornia. 



Genl. Char. Large; colors pale; tail longer than head and body; 

 mastoids greatly developed. 



Color. Above pale yellowish brown, hairs plumbeous at base; 

 legs, feet and under parts white; tail white with a pale brown dorsal 

 stripe from near base to white tip, growing darker towards end. 

 White spot over eye and behind ear. White thigh stripe. 



Measurements. Total length, 133; tail vertebr.T, 204; hind foot, 52. 



354. spectabilis. {J)ipo,iomys), Merr., N. Am. Faun., No. 4, 1893. 

 Type locality. Das Cabejos, Cochize County, Arizona. 



Geogr. Distr. Portions of Texas and Arizona eastward to Sierra 

 Blanca, Texas. 



Genl. Char. Size large; tail nearly twice the length of head and 

 body; mastoids meet behind parietals; maxillary bridge of orbit 

 broad. 



Color. Above ochraceous buff lined with black, sides paler; top 

 of head and back darkest; fascial crescent crossing nose black; hip 

 patch ochraceous; hind leg, white above, dusky below. Dorsal 

 stripe of tail dusky for basal half followed by a broad black band, 

 terminating in a long white brush; ventral stripe dusky, the two 

 meeting about two-thirds the length of tail from base, the lateral 

 white stripes disappearing. 



Measurements. Total length, 355; tail vertebra', 211; pencil, 30; 

 hind foot, 56; ear, 17.5. 



355. elator. {DipoJomys), Merr., Proc. Biol. Soc. Wash., 1894, p. 109. 



jype locality. Henrietta, Clay County, Texas. 



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



Genl. Char. Similar to D. spectahilis, but smaller; tail more 

 slender, hind feet longer; supraoccipital between bulla' very broad; 

 interparietal broad as long. 



