- 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 once distinguished by its white thighs. 
PYGATHRIX 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. opscura 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 axillz 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. NatuN2% Thos. and 
Hart., but its nearest ally is P. opscura, from which it differs only in 
the narrow blackish line along the flanks. 
PyGAaTHRIX CANA (Miller). 
Presbytis cana Miller, Proc. U. S. Nat. Mus., XX XI, 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. 
