PYGATHRIX 67 
to a foliated tree, having a stony kernel. They were often observed 
foraging in company with Hylobates syndactylus, but with this excep- 
tion they were never seen along with other monkeys. One individual 
which was taken alive, proved to be wild and untamable.” 
PYGATHRIX POTENZIANI (Bonaparte). 
Semnopithecus potenziant Bonp., Comptes Rendus, XLIII, 1856, 
p. 412, (note, desc. insufficient). 
Semnopithecus chrysogaster Licht., Peters, Monatsb. K. Preuss. 
Akad. Wiss. Berlin, 1879, p. 830, pl. IVb; Blanf., Proc. Zool. 
Soc. Lond., 1887, p. 627; Jd. Faun. Brit. Ind., Mamm., 1891, 
p. 38. | 
Presbytis chrysogaster Licht., Peters, Proc. Zool. Soc. Lond., 1866, 
p. 429; Blyth, Mamm. and Birds Burma, 1875, p. 10. 
Semnopithecus pileatus Anders., Exped. Yunnan, Zool., 1878, p. 
13. (In synonymy). 
RED-BELLIED LANGUR. 
Type locality. ? Type in Berlin Museum. 
Geogr. Distr. Sipora, and South Pagi islands, Mettawee Group. 
(Modigliani), (Abbott). 
Genl. Char. Small compressed crest from crown to nape; whisker 
tufts absent. Chin and lips with few white hairs. 
Color. Patch on top of head jet black; front and sides of head, 
and behind ears grayish white; hind neck black, the hairs rufous at 
base and tipped with black, the rufous showing on sides and above 
shoulders; rest of body, limbs, hands, feet and tail black, the rufous 
of the base of hairs giving a tinge to the black ; throat and chest grayish 
white; under parts rufous. Young yellow. Ex type Berlin Museum 
of P. chrysogaster. 
Measurements. Total length, 1,140; tail, 550. Skull: total length, 
102; Hensel, 66; occipito-nasal length, 97.7; zygomatic width, 75; 
intertemporal width, 41.1; greatest width of braincase, 54.6; palatal 
length, 36.1; median length of nasals, 11.9; length of upper molar 
series, 29.2 ; length of mandible, 74; length of lower molar series, 33.9; 
length of canines, 17. 
This species has been considered the same as P. pILEATUS Blyth, 
from which, however, it is quite distinct. Two examples are in the 
Berlin Museum, the type, an adult animal from which my description 
was taken, and a young one. They were stated to have been obtained 
in Tenasserim, but that was a mistake as the species inhabits the 
Mettawee group of islands off the west coast of Sumatra. 
