152 LLOYDS NATURAL HISTORY. 



Swiia lar (nee L.), Raffl., Tr. Linn. Soc, xiii., p. 242 (1822). 

 Hylobates lar (nee L.), F. Cuv., Hist. Nat., INIamm., pis. 7, 8 



(1824); Blyth, J. A. S. Beng., xliv., ex. no., p. 2 (1875). 

 Hylobates varlegalus,Temm., Monogr. Mamm., i., p. xiii. (1827); 



Wagner in Schreb. Saugeth. Suppl. v., p 16 (1855); 



H. O. Forbes, Nat. Wand. East. Areh., p. 156 (1885). 

 Hylobates rafflesii^ Is. Geoffr., Cat. Meth. Primates, p. 8 



(1851); Gray, Cat. Monkeys Brit. Mus., p. 11 (1870). 

 Hylobates pileatus, Gray, P. Z. S., 1861, p. 136, pi. xxi. ; id., 



Cat. Monkeys Brit. Mus., p. 10 (1871); Anderson, Zool. 



Res. Exped. Yun-nan, p. 6 (1878). 

 Characters. — Faee blaek ; eolour entirely black, but becoming 

 brown on the back and sides, and with a white superciliary 

 band, and sometimes ashy-grey cheeks. 



This is the typical form of the species in Mid-Sumatra, 

 where the present writer had the opportunity of examining 

 it alive. It was with difficulty distinguished from H. syn- 

 dactylus, except from its size and the presence of the white 

 superciliary band. 



Other specimens (but none of them met with to the south 

 of the Moesi river by the present writer) have been described, 

 with the occiput, the back from immediately behind the 

 shoulders, the flanks, the hips, and the outer surfaces of the 

 fore- and hind-limbs, pale yellow. The shoulders, chest, and 

 belly, and the inside of the limbs and feet dark brown ; eye- 

 brows and whiskers pale grey. {A?ide?'so}i.) 



The variety described as H. pileatus is distinguished by a 

 black cap-like patch on the top of the head ; the chest, throat, 

 and belly blaek; the back of the head, the upper surface ot 

 the body, the limbs and area round the black cap grey. This 

 variety may also be entirely white, except for the coronal cap 



