S. American LcporiJae. 211 



much darker than in any of tho otlier races, and especially 

 darker tlian in tlie nearest one geographically, the pale 

 S. b. chapadiv. Back heavily overlaid with black, the light 

 rings strong buffy, jjaler on sides. Under surface greyisii 

 white. Chill and nostril patches pure white. Crown mixed 

 tawny and black. Superciliary streak cream-buff, strongly 

 contrasted. Cheeks heavily blackened. Ears with the 

 basal halves of their proectote strongly tawny, the terminal 

 halves blackish. Nuchal patch large, rich ta^vny. Hands 

 and feet pale tawny above. Tail dull buffy basally, the end 

 smoky brown above, dull buffy below. 



Skull about as in brasUiensia, the tip of the muzzle narrow 

 and pointed, the postorbital processes rather slender, the 

 palatal foramina narrow, and the bullae inconspicuously 

 smaller than in the eastern races. 



Dimensions of the type (measured on the skin) :— ' 



Head and body 365 mm, ; hind foot 75 ; ear 40. 



Skull : greatest length 70 ; condylo-incisive length 61'7; 

 zygomatic breadth 35 ; nasals, length 27, breadth ante- 

 riorly 8, posteriorly 13"7 ; interorbital breadth on ridges 17 ; 

 intertemporal breadth l-4'3 ; breadth of brain-case 26 ; 

 palatal foramina 19 X 6'3 ; upper tooth-series (alveoli) 14. 



Ilab. Marcapata, E. Peru. Type from Cadena. 



Type. Adult female. B.M. no. 4. 12. 4. 15. Collected in 

 1902 by J. Kalinowski. Received in exchange from the 

 Branicki Museum, AVarsaw. Three specimens. 



This Peruvian race of the Brazilian hare is readily dis- 

 tinguishable by its dark strongly contrasted colours. 



i'orms referable to what I should consider S. brasiliensis 

 in the broad sense range over the southern half of Brazil, 

 and westwards to Peru. Northwards they range into 

 Colombia, and will probably be found to intergrade with 

 S. gabbi. Then on the north coast and islands of Colombia 

 and Venezuela there occurs S. cumanicus, from which, with 

 topotypes of both before me, I scarcely think S. margaritce 

 and superciliaris can be distinguished. S. orinoci, however, 

 is a more isolated form, tending again towards S. brasiliensis. 

 The Andean hares, iy. meridensisf ajidinus, and their allies, 

 form another group, very different looking externally, but 

 really essentially related to the rest. Finally, the black- 

 naped hares of Maracaibo and Oruba Island, N. Venezuela 

 (6'. nigronuchalis and its rather dubious subspecies continentis) , 

 are the most obviously different from the rest of all the 

 S. American Leporidte. 



