746 APPENDIX. 
feet white; tail above black, this color extending in narrow line on 
rump; beneath grayish white; ear blackish at base, grayish white on 
middle, pure white on terminal portion; border on basal half buffy; 
remainder white to near tip, which is buffy. 
Measurements. Total length, 655; tail vertebre, 96; hind foot, 
137; ear from notch (dried skin), 112. Skull: occipito-nasal length, 
99; basal length, 77; length of nasals, 44; greatest interorbital width, 
24; parietal breadth, 32; depth of rostrum at front base of premolar, 
26; width above same point, 26; greatest diameter of bullae, r2. 
45la. festinus (Lepus), Nelson, Proc. Biol. Soc. Wash., xviI, 1904, 
iD Mores 
HipaLtco Jack Rassit. 
Type locality. Irolo, State of Hidalgo, Mexico. 
Geogr. Distr. Southeastern part of Mexican tableland in southern 
and eastern parts of State of Queretaro, throughout most of the State 
of Hidalgo, extreme northern part of State of Mexico, and Valley of 
Mexico, State of Tlaxcala and adjacent northern part of State of 
Puebla. 
Genl. Char. Nearly related to L. asellus, ears longer; no black 
patch on nape. 
Color. Top of head dingy grizzled buff; back buffy tinged with 
dull reddish brown mottled and grizzled with black; sides of body 
paler and grayer; thighs and rump iron gray divided on rump by black 
line; sides of head and neck dull buff; neck beneath dark buff; nape 
grizzled grayish; chin and under parts white; top of fore legs grizzled 
dingy buff; top of hind feet dingy white; toes grayish; tail above black, 
beneath dingy gray; lower half of ears grizzled yellowish gray and 
fringed with yellowish white hairs; terminal portion white with black 
patch on tip, and edge dusky. 
Measurements. Total length, 575; tail vertebrae, 78; hind foot, 
126; ear from notch (dried skin), 138. Skull: occipito-nasal length, 
96.5; basal length, 74; length of nasals, 43; greatest interorbital width, 
26.5; parietal breadth, 31; greatest diameter of bulle, 14; width of 
rostrum above front base of premolars, 25. 
