NO. 1577. MAMMALS COLLECTED L\ WESTERN BORNEO— LYON. 567 



PRESBYTIS CHRYSOMELAS (Schlegel). 



1838-39. Semnopithecus chrysomelas Schlegel, Tijdscrift Natuur. Geschied. 



Physiol., V, p. 138. (Type-locality, Pontianak, western Borneo.) 

 1839-1844. Semnopithecus chrysomelas, Muller and Schlegel, Verhandl. 



Natuur. Geschied. Nederlandsch Bezittingen, p. 71, pi. x, figs. 1 and 2: 



pi. XI, figs. 2, 3. 



Nine specimens, seven skins with skulls, one skin without skull, 

 and one skull without skin, all of them practically topotypes of Pres- 

 hytis chrysomelas (vSchlegel). For list of the specimens and measure- 

 ments see table on pao;e 568. In addition to the eight mentioned 

 in the table is Cat. No. 143628, U.S.N.M., adult male, skin without 

 skull, no measurements taken by collector, from 10 miles below 

 Pulo Limbang. 



The color of these specimens is very similar to that of the figure of 

 the male shown in Miiller and Sclilegel's plate (fig. I, pi. x, volume 

 cited) except that the underside of the tail for its basal half or three- 

 quarters is white or wliitish in Doctor Abbott's series, instead of 

 yellowish, as in the plate. Doctor Abbott's series shows no diiference 

 in color between the two sexes. The white on the underside of the 

 tail is a very conspicuous marking, so that the basal portion of that 

 organ is sharply l)icolor. The lower belly, a narrow line down the 

 inner side of the thigh and legs, are whitish, while a spot on the 

 breast, a line on the throat, and a line down the arms and forearms 

 are gray. The rest of the animal, whether male or female, is black 

 or blackish. 



The chief difference in color between Preshytis chrysomelas and P. 

 sumatranus appears to be in the clearer and more contrasted white 

 markings of tlie Bornean form. The skulls of the two species appear 

 to liave slight if any differences, the most conspicuous being the 

 greater inflation of the cranium, just below the lambdoid suture in 

 P. chrysomelas, and slightly narrower opening of the anterior nares 

 in P. sumatranus. 



[The commonest Semnopithecus along the Kapuas was a black one 

 witli whitish belly and under the tail. The black was deep and dull, 

 not like sumatranus, and entirely difterent from Semnopithecus hosei 

 and everetti, both of which are in the museum here [Singapore]. I did 

 not meet with the red form [Preshytis ruhicumlus], but the natives 

 said it was common in the hills. — W. L. Abbott.] 



