582 MR. O. THOMAS ON A NEW SEMNOPITHECUS. [NoV. 15, 



1. Description of a new Monkey of the Genus Semno- 

 pithecus from Northern Borneo. By Oldfield Thomas. 



[ReceiTed October 25, 1892.] 

 (Plate XLI.) 



In 1889 I had the pleasure of describing before this Society^ a 

 very beautiful species of Semnopithecus from the Baram district, 

 North-eastern Sarawak, which was discovered by Mr. Charles Hose, 

 and was named in his honour Semnopithecus hosei. Of this Monkey 

 many specimens, all from much the same district, have come to 

 Europe, and I have reason to believe that most of the European 

 Museums are now supplied with examples of it, all obtained by the 

 same energetic and successful collector. In our own Museum we 

 have, besides the type, another adult male, two young specimens, 

 and an adult skeleton. All these specimens, including young ones 

 barely a foot in length, have shown the most striking uniformity in 

 their coloration, there being in none of them the smallest deviation 

 from the colour depicted in my illustration of the type {t. c. 

 plate xvi.). 



Now, however, the Museum has received, first from Mr. A. 

 Everett, who noticed the differences himself, one specimen, and then 

 from Mr. Hose two more, of a Monkey undoubtedly closely allied 

 to 8. hosei, but yet all three so like each other and so different in 

 markings from any specimen of that species which I have seen, that 

 I feel unable to consider it to be S. hosei, and therefore must 

 describe it as new. 



Mr. Everett's specimen having been the first obtained, I propose 

 to make it the type, and to name the species in honour of its 

 discoverer, who, as already mentioned, had himself noticed its 

 distinguishing characters. 



Semnopithecus everetti, sp. n. (Plate XLI.) 



Size and proportions as in S. hosei. Colour of body, limbs, and 

 tail as in that species except that the white is everywhere replaced 

 by dull cream-colour, and this change produces a marked yellowish 

 suffusion in the mixed grey of the back and tail; the shoulders and 

 the centre of the back are also darker, a character still more marked 

 in the two Dulit specimens than in the type. Belly and the light 

 parts of the head pale yellowish or cream-colour, quite different 

 from the snowy white of S. hosei. The chief difference, however, 

 lies in the distribution of the colours of the head, for while in 

 S. hosei only the centre of the crown and a narrow line down the 

 nape are black, the rest, including the whole of the region round 

 and above the ear, being pure white, in 8. everetti the whole of the 

 forehead and top of head are black, the loWer limit of the black 

 passing across the middle of the ear, and the whole breadth of the 



1 P.Z.S. 1889, p. 159. 



