PYGATHRIX 85 
edge yellowish brown going below knee, hands brownish black; feet 
brownish black but overlaid with russet hairs; space above eye and 
eyelids, and upper lip flesh color, probably orange yellow in life; face 
black covered with short black hairs; whiskers long extending beyond 
ears black, grading into drab gray towards tip; chin whitish; inner 
side of arms olive gray, tinged with buff; under part of body grayish 
white tinged with buff; tail above brownish olive gray, beneath olive 
gray. Ex type British Museum. 
Measurements. Total length, 1,160; tail, 620; foot, 160. Skull: 
type, occipital region gone; intertemporal width, 46.2; zygomatic 
width, 81.4; breadth of braincase, 60; length of nasals, 11.5; palatal 
length, 32.7; length of upper molar series, 27.1; length of upper 
canines, 19.4; length of mandible, 75; length of lower molar series, 
33.7. Ex type British Museum. 
The two specimens in the British Museum, both males, are from 
the same locality, and the type, a very old individual, is the only one 
having russet hairs on any part of the arms or body. The other male 
is a beautiful drab gray above and on the limbs, with hands and feet 
brownish black, this color extending slightly on outer side of fore- 
arms above wrist; the tail is silver gray with a slight olive tinge. I 
attribute the russet hairs seen on the type to age. It is a very hand- 
some species in its attractive Quaker dress. 
PYGATHRIX CREPUSCULA WROUGHTONI (Elliot). 
Presbytis crepuscula wroughtoni Elliot, Ann. Mag. Nat. Hist., 
IV, 8th Ser., 1909, p. 272. 
Type locality. Pachebon, Siam, (Mouhot). Type in British Mu- 
seum. 
Genl. Char. Forehead and temples not black; hands and feet jet 
black; upper parts generally paler than P. crEpuscuLA, more silvery. 
Color. Space above eyes and lips flesh color, rest of face blackish 
brown; a line of stiff, black, erect hairs above eyes; top and sides of 
head, wood brown; whiskers reaching beyond ears, wood brown; hind 
neck and upper parts of body and arms to elbows, silvery drab gray, 
varying in depth of shade according as the light falls upon it, but 
always paler, and of a different hue from P. crepuscuLa; forearms 
brownish gray, grading almost into blackish brown, on hands speckled 
with whitish from tips of hairs; legs a paler silvery drab gray than 
back, the outer edge over knees brownish; feet blackish brown; tail 
silvery gray on basal half grading into brownish gray for the remaining 
