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, Z2.7 \ 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 

 ha,ving 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 



