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 vertebrae, 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, 12. 



451a. festinus (Lcpits), Nelson, Proc. Biol. Soc. Wash., xvn, 1904, 



p. 108. 

 HIDALGO JACK RABBIT. 



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 bullae, 14; width of 

 rostrum above front base of premolars. 25. 



