1899-] Allen, New Rodents from Colombia and Venezuela. 19? 



all taken at or near Bonda. They vary but little in coloration, 

 the adults mainly in the buff tint of the upper parts, which 

 ranges from strong buff to pale btiffy white. 



Lepus superciliaris belongs to the Sylvilagus group of Lepus, and 

 to the section represented by L. insolitus Allen of Colima, Mexico, 

 with which it agrees in the general conformation of the skull, and 

 especially in the deep grooving of the external face of the malar. 

 It hence has no close relation to the subgentis Taped. It should 

 be compared with Lepus cumanicus Thomas, from Cumana, 

 Venezuela, which is doubtless its nearest ally, and with which it, 

 closely agrees in size and in general features. L. cumanicus, 

 judging from the description, is much paler, and if the conspicn 

 uous black superciliary stripe so characteristic of the Bonda form 

 is present in cumanensis it is not mentioned in the detailed descrip- 

 tion of the species. Also the deep clear rufous of the frontal 

 region of the head in L. superciliaris is not mentioned in the 

 account of cumanensis. The geographical and faunal relations 

 of Bonda and Cumana, as indicated by the representation of 

 other groups of Rodents in the two regions, point to at least a 

 subspecific differentiation in the Hares of the two localities. 



Isothrix rufodorsalis, sp. nov. 



Type, No. 14606, $ ad., Onaca,. Santa Marta District, Colombia, Dec. 24, 

 1898; Coll. H. H. Smith. 



Pelage very soft, almost woolly, full and long. Color of dorsal area deep 

 rufous, paler yellowish rufous on the sides, including sides of head to the, 

 nose ; a few long black-tipped hairs on the top of the head and nape ; 

 below, including inner surface of limbs, fulvous, passing insensibly into the, 

 color of the sides ; whiskers, a tuft of long bristles between the eye and ear,, 

 and a tuft of long hairs, at the iuner base of the ear, intense black ; ears small, 

 pale brown, naked externally, but with numerous long hairs from the inner sur-s 

 face ; upper surface of fore and hind feet pale fulvous gfiay ; tail heavily haired 

 throughout, basal three-fifths black* teTminal two-fifths pure white. 

 ' Meastirements. Type (and only specimen), total > length, 45,7 mm. ; tail 

 vertebras, 267 ; hind foot, without claws, 35, with claws,. 40; ear, 12. (Foot 

 and ear measured from dry skin.) 



Skull, total length, 52.5 ; basal length, 40; zygomatic width, 24.5 ; mastoid 

 width, 21 ; interorbital width, 24 ; length of nasals, 15 ; width pf nasals at 

 middle, 5 ; crown length of upper toothrow, 5.8 ; palajal length, 5.3 ; length 

 of lower toothrow, 5.3. f 



This very interesting species is based on a single specimen' 

 from Onaca. The pelage is very soft and full, the tail heavily' 



