1875.] 



Long-tailed Monkeys. 



9 



Fam. Colobidse. 



Long-tailed Monkeys, which have no cheek-pouches, the stomach sacculated, and 



which subsist to a considerable extent on green foliage. 

 *6. Peesbytes ceistatus. 



Simla cristata, Raffles ; Semnopithecus pruinosus, Desmarest; S.phayrei, Blyth, J.A.S.B. 

 xvi. p. 733 ; 8. argentatus, Bl., MS., Horsfield's Catalogue, No. 8. MyouJc-huyo, Arakan. 

 The Silvery-leaf Monkey inhabits Arakan, Tenasserim provinces, 

 Malayan peninsula, Sumatra, Banka, and Borneo. 



Of a somewhat glistening or silvery dark ash colour, with white under- 

 pays ; a conspicuous crest on the vertex, and long whisker-tufts, which 

 conceal the ears on a front view; face leaden black, contrasting with 

 pinkish flesh colour on the mouth and lips, extending to the lining of the 

 nostrils, besides which a large semi-circular mark of a paler and more 

 livid tint occupies the inner half of each orbit. Three small living young 

 sent from Eamri Island by Captain J. R. Abbott were quite similar in 

 colouring to the adults, showing no trace whatever of rufous; but 

 P. cristatus is described to have the young bright rufous, as in some of the 

 allied species, and certainly the figure assigned to the young of P. cristatus 

 in the great Dutch work by Professor Temminck and Dr. S. Muller, repre- 

 sented of a rufous colour, and with ears conspicuously visible on a front 

 view of the face, can hardly refer to the Arakan species, which neverthe- 

 less appears to be true P. cristatus. Writing of P. obscurus and P. melanopus 

 (P. albo-cinereus apud Schinz), in the Malayan peninsula, Dr. Cantor remarks 

 that "both attain to the same size, have in common the shape of the body, 

 the white marks on the face, and the general distribution of colour;" 

 while of P. cristatus he states that "the whitish colour on the eyes and 

 mouth is present, though less distinct than in the preceding two species."* 

 Those markings, however, could not be more conspicuously so than in the 

 three young examples from Ramri already noticed, one of which is now 

 mounted in the India Museum, London. 



A species is referred to P. albocinereus by Dr. Anderson, as being 

 " common on the banks of the Tapeng;" f and P. albocinereus of the Malayan 

 peninsula apud Schinz and Cantor must bear the name P. melanopus, Geoff. 

 {Semnopithecus siamensis, S. M tiller, = & nigrimanus, Is. Geoffroy, = S. 

 cinereus, Gray, and the young S. dorsatus, Waterhouse). It occurs commonly 

 in collections from Malacca, and as it has been received from Siam, it is 

 likely to occur in the Tenasserim provinces. One distinguishing character 

 * J. A. S. B. xv. p. 175. f " Report of Expedition," etc., p. 271. 



