PYGATHRIX 39 



212 ; Gray, Cat. Monkeys, Lemurs and Fruit-eating Bats, 

 Brit. Mus., 1870, p. 16; Schleg., Mus. Pays-Bas, Simiae, 1876, 

 p. 34; Anders., Zool. Exped. Yunnan, 1878, p. 39; Hose, 

 Mamm. Borneo, 1893, p. 12. 



Semnopithecus {Trachypithecus) frontatus Reichenb., VoUstand. 

 Naturg. Affen, 1862, p. 90, pi. XV, figs. 211, 212. 



Pygathrix frontata Lyon, U. S. Nat. Mus., XL, 1911, p. 140. 



WHITE-FRONTED LANGUR. 



Type locality. East of River Banjer, southeast Borneo. Type 

 in Leyden Museum. 



Geogr. Distr. Southeastern Borneo. 



Genl. Char. Bald triangular wrinkled area between eyebrows ; 

 median crest erect, overhanging forehead ; hair on cheeks long, depend- 

 ent ; forehead narrow, high ; facial portion of skull short ; orbits broad. 



Color. Triangular spot on head white ; line between eyes and nose, 

 and line on margin of upper lip and lower lip flesh color; rest of 

 face and the nose black ; lips covered with short yellow hairs ; hairs on 

 head diverge on three sides from the bare spot ; long black hairs from 

 forehead over and behind eyes, extend backward over temples and 

 cheeks in a lengthened point to behind ear; crest rises from behind 

 the bare spot, and extends over center of head to nape, of equal length 

 throughout, and with the hairs on top of head, is blackish brown; 

 entire upper parts of body, and outer side of arms to shoulders Prout's 

 brown ; forearms above from wrist black, grading to dark brown above 

 elbows ; hands, legs below knees, and feet, black ; thighs, blackish 

 brown ; lower part of cheeks, throat, inner side of limbs, and entire 

 under parts of body pale reddish, inclining to yellowish on cheeks, 

 breast and beneath arms ; tail above black at base, rest greenish olive, 

 beneath brownish black at root, remainder greenish olive like the upper 

 part. Ex type Leyden Museum. 



Measurements. Total length, 1,200; tail, 760; foot, 155, (skin). 

 Skull: total length, 93.5; occipito-nasal length, 91.6; zygomatic width, 

 72.4 ; length of upper molar series, 25 ; length of mandible, 64.6 ; length 

 of lower molar series, 28.8. Ex type Leyden Museum. 



This is a brown monkey, with partially black limbs and wholly 

 black hands and feet. It differs in many ways, besides coloration, from 

 the next species from northwest Borneo. The skull has a high arched 

 narrow forehead, with the superior outline circular; the bare space 

 on forehead is triangular in shape and white, (it is square and yellow 

 in the northern species, possibly in life it is orange yellow). Besides 



