Color. Above gray and blackish brown mixed; nape pale rusty; 

 dorsal region pale buffy gray, sides pure gray; beneath white; pec- 

 toral band brownish gray; fore legs yellowish brown; hind feet gray- 

 ish brown. Tail, above dark gray, beneath white; ears brownish 

 gray. 



Measurements. Total length, 294; tail, 24; hind foot, 63; ear 

 from notch, 58. 



E. Microtolagas, 



Interparietal obliterated in adults, skull twice as long as wide; 

 postorbital processes large, arching and united to cranium by a 

 suture, and enclosing a wide and long foramen; nasals lengthened; 

 upper front incisors without distinct lateral groove. Ears very long. 



435. alleni. {Lepiis), Mearns, Bull. Am. Mus. Nat. Hist., 1890, 11, 



p. 294. 



Type locality. Rillito Station, Southern Pacific Railroad, Ari- 

 zona. 



Geogr. Distr. Desert region between Phcenix and Benson, Ari- 

 zona. 



Genl. Char. Size large; ears large; fulvous gular patch. 



Color. Above yellowish brown mixed with black; nape fulvous; 

 sides, hips, rump and outside of legs white, mixed with black, giving 

 a gray effect; pectoral band fulvous, rest of under parts white; head 

 pale yellowish gray; feet white above. Tail, above gray with a line 

 of plumbeous black extending on to the rump; beneath white. Ears 

 whitish with fringe white. 



Measurements. Total length, 643; tail vertebrae, 69; hind foot, 

 138; ear from notch, 156. 



436. callotis. {Lcpus), Wagl., Syst. Amph., 1830, p. 35. 

 nigricaudatus, Bennett, Proc. Zool. Soc, 1833, p. 41. 

 mcxicanus, (Licht.), Richards, 6th Rep. Brit. Ass., 1837, p. 150. 

 flavigularis, Wagl., Supp. Schreib. Saugth., iv, 1844, p. 107. 

 Type locality. Mexico. 



Geogr. Distr. Vicinity of the southern boundary of the United 

 States into Mexico. 



Genl. Char. Size large, similar to L. texcnsis, Waterh., but the 

 black on tips of ears almost obsolete, quite so in some specimens, 

 the tips being pale yellowish or white. 



Color. Above yellowish brown of greater or less intensity, 

 mixed with black, sides paler; rump and thighs whitish ash lined 



