58 PYGATHRIX 



This is a plainly colored animal, its only colors a purplish black 

 and white, but from the distribution of these hues, is rather con- 

 spicuous than otherwise. On the upper parts it does not look unlike 

 P. FEMORALis, but IS at oncc distinguished by its white thighs. 



Pygatheix rhionis (Miller) . 



Presbytis rhionis Miller, Miscel. Coll. Smith. Inst., Wash., 1903, 

 p. 64. 



Type locality. Telok Pemudong, Pulo Bitang, Rhio Archipelago. 

 Type in United States National Museum. 



Genl. Char. Like P. obscura but not so dark. Blackish tinge on 

 back ; legs and tail absent ; line along flanks narrow. 



Color. Forehead and temples black or nearly so, front of crown 

 lighter ; upper parts broccoli brown ; shoulders wood brown ; flanks 

 and lumbar region chocolate; arms seal brown to elbows, above like 

 body; from axillae to thighs a faint dark line bordering white of under 

 parts; thighs brownish black to a patch, which is white tinged with 

 cream color; entire under surface and inner side of arms to elbows, 

 and legs to knees, white tinged with gray, darkest on chest and thighs ; 

 hands and feet blackish ; tail, basal fourth above broccoli brown, 

 grading into seal brown at tip, beneath like upper surface; face slaty 

 in life ; eyelids and lips fleshy white ; palms of hands and soles of feet 

 black. Ex type United States National Museum. 



Measurements. Total length, 1,173; tail, 705; foot, 150. Skull: 

 total length, 86 ; occipito-nasal length, 77.2 ; Hensel, 56.5 ; zygomatic 

 width, 65.3 ; intertemporal width, 45.3 ; palatal length, 27.5 ; median 

 length of nasals, .79 ; length of upper molar series, 22.7 ; length of 

 mandible, 62.2; length of lower molar series, 28.8. Ex type United 

 States National Museum. 



Mr. Miller compares this species with P. natun^ Thos. and 

 Hart., but its nearest ally is P. obscura, from which it differs only in 

 the narrow blackish line along the flanks. 



Pygathrix cana (Miller). 



Presbytis cana Miller, Proc. U. S. Nat. Mus., XXXI, 1906, p. 275. 



Type locality. Pulo Kundur ; Rhio Archipelago. Type in United 

 States National Museum. 



Genl. Char. Only differing from P. rhionis in a rather broad, 

 indistinct dark band along flanks, and the basal portion of hairs at 

 the radiating point on crown being white. Ex type United States 

 National Museum. 



