210 Mr. O. Thomas on 



chapodetist's, and paraguensis should all be considered as 

 subspecies of hrasiUensis, while an additional subspecies from 

 Peru is described below. 



But the little hare of Rio Janeiro, hitherto taken for 

 hrasiliensis, is certainly an entirely different species, and may 

 be called 



Sylvilagus tajietillus, sp. n. 



Size exceedingly small, skull little larger than that of the 

 smallest N. American hares. General coloration dark, 

 strongly contrasted. Light rings on dorsal hairs buffy, 

 little lighter on sides. Light nostril patch large, white, 

 conspicuous ; cheeks blackish. Superciliary streak broad, 

 strongly marked. Ears rather long for this group, their 

 proectote grizzled taw^ny basally, black terminally. Nuchal 

 patch dark rufous. Fore feet pale tawny ; hind feet mixed 



cvi.vnj UUU WtllLlSu. 



Skull small, slender, witu luirmw muzzle. Postorbital 

 processes slender, anchylosed terminally to the skull in the 

 type, and merely leaving a narrow foramen about 2 mm. in 

 length. Palatal foramina narrow. Bullae rather small. 



Teeth with the approximated enamel walls of the cjuterior 

 and posterior laminse less strongly crenulated than usual ; 

 anterior premolar with only three convex loops of enamel 

 anteriorly. 



Dimensions of the type (measured on the badly prepared 

 skin) : — 



Head and body 295 mm. ; hind foot 70 ; ear 46 (dry). 



Skull : greatest length 61 ; condylo-incisive length 55 ; 

 zygomatic breadth 32-5 ; nasals, length 24, breadth ante- 

 riorly 8-3, posteriorly 11'7 ; iuterorbital breadth (on ridges, 

 not at notch) 14'6 ; breadth of brain-case 24-3 ; palatal 

 foramina 14*5x5 ; breadth of palatal bridge 7 ; upper tooth- 

 series (alveoli) 13. 



Hab. Rio Janeiro. Type from Porto Real, near Rezende. 



Ti/pe. Old specimen, sex indeterminable. B.M. no. 

 92. 11. 24. 3. Collected by L. Hardy de Dreneuf. 



This little hare is readily distinguishable from all the 

 members of the Sylvilagus hrasiliensis group by its much 

 smaller size. Its distribution would seem to be limited to 

 the near neighbourhood of Rio de Janeiro. 



(2) The Haee of Eastern Peru. 

 Sylvilagus hrasiliensis inca, subsp. n. 



A dark strongly coloured race of hrasiliensis. 



ISize and general characters as in S. hrasiliensis ; colour 



