108 Nelson Seven New Rabbits. 



Distribution. Southern part of Sonora (from the Rio Yaqni) south at 

 least to Culiacan, central Sinaloa. 



General characters. Darker and more richly colored than typical arizonse, 

 with the white and rufous areas on legs sharply contrasting. Bullae much 

 smaller. 



Description of type in winter pelage. Top of head and back creamy 

 ochraceous-buff grizzled and washed with black; sides of head and body 

 slightly paler, more pinkish huffy, with much less overlying black ; small 

 area on rump distinctly iron gray with scarcely a trace of huffy ; nape rusty 

 rufous ; top of tail dark brown grizzled with dull huffy ; neck, on sides and 

 below, pinkish buff ; rest of under parts clear white ; front and sides of 

 fore legs rusty ochraceous buff, becoming paler on front of legs and top of 

 feet ; back of fore legs clear white; sides and back of lower part of hind 

 legs and feet a little darker and more rusty rufous than fore legs ; line 

 along front of hind legs and top of feet white, sharply outlined, as on fore 

 legs, by rufous ; inside of ears dingy gray ; outside or convex surface finely 

 grizzled grayish, buffy brown shading into a narrow blackish border about 

 tips. 



Skull characters. Skull generally similar to that of typical arizonse, but 

 with rostrum broader and more inflated, or less tapering anteriorly and 

 decidedly smaller bullse, which in shape and proportion to skull resemble 

 those of the floridanus group. 



Measurements. External measurements of type (taken in flesh) : Total 

 length, 388 ; tail vertebrae, 56 ; hind foot, 87 ; ear from notch (from dried 

 skin), 66. 



Cranial measurements of type : Occipito-nasal length, 66 ; basal length 

 of Hensel, 52; interorbital breadth, 17 ; parietal breadth, 24; length of 

 nasals, 27 ; greatest diameter of bullse, 11. 



Specimens examined. Fifteen. 



Subgenus Macro tolagus Mearns. 

 Lepus festinus sp. nov. 



HIDALGO JACK RABBIT. 



Type No. 53,490, adult male, U. S. National Museum, Biological Survey 

 Collection. From Irolo, Hidalgo, Mexico. Collected March 31, 1893, by 

 E. W. Nelson and E. A. Goldman. Original number 4522. 



Geographic distribution. Southeastern part of Mexican tableland in 

 southern and eastern Queretaro, throughout most of Hidalgo, extreme 

 northern part of State of Mexico (including valley of Mexico), Tlaxcala 

 and adjacent part of northern Puebla. 



Specific characters. In general appearance much like L. merriami but 

 darker, with much larger ears, the latter with a large, well-marked black 

 spot at tip on convex side ; nape gray, paler than back ; skull smaller and 

 lighter than in merriami. 



