244 Mr. 0. Thomas on 



This sliiking monkey is readily distinguished from all its 

 allies by its red ears and the reduction of the yellow in its 

 body-colour. Its geographical ally, C. Mulonei/i, is parti- 

 cularly strongly coloured on the back. 



XXXIV. — On Two new Hares allied to Oryctolagus crassi- 

 caudatus. By Oldfield Thomas. 



A RENEWED examination of the South-African hares of the 

 remarkable Oryctolagus crassicaudatus group has convinced 

 me that not only is the form from Nyasa previously deter- 

 mined as 0. crassicaudatus worthy of being distinguished, 

 but also that another hare from the Orange River Colony, 

 collected some years ago by Mr. A. W. Curry, should also 

 be described as new. 



Good material for the description of the true 0. crassi- 

 caudatus of the Cape is still wanting, and I am at present by- 

 no means certain whether the type of Smith's Leinis rupestris 

 (B.M. no, 45. 7. 3. 8) is only a young specimen of 0. crassi- 

 caudatus or represents another definable form. In colour it 

 closely agrees with the older known form, and is therefore 

 unquestionably distinct from the small O.c. Cj^vj/z described 

 below. A large 0. crassicaudatus has a hind-foot length 

 of 97 millim. (s. u.) and a greatest cranial length of 92 millim. ; 

 in the type of L. rupestris these measurements are respec- 

 tively 71 and 69 millim. 



Whether these hares are best considered as subspecies of 

 0. crassicaudatus or as sjjecies of a crassicaudatus "group," 

 I am doubtful, but, for the sake of showing their relationship, 

 I provisionally adopt the former method. I am, however, by 

 no means convinced that this is the proper solution of the 

 difficulty. 



Oryctolagus crassicaudatus ngikce, subsp. n. 

 Lcpvs crassicauclatns, Thos. P. Z. S. 1897, p. 938 (nee Geoff.). 

 Size markedly less than in the true 0. crassicaudatus, the 

 feet particularly short and stumpy ; ears also decidedly 

 shorter. Coloration essentially as in that animal, the head 

 and body grizzled greyish fawn, the rump more rufous. 

 Individually the longer hairs of the back are black, with a 

 subterminal buffy band and a paler base, and the wool-hairs 

 are pale slaty grey for their basal halves, then buffy and the 



