348 MR. C. BODEN KLOSS ON 
face and buttocks brightly coloured. 
Colour. Upper parts of neck and body, shoulders, outer 
sides of forelimbs and outer parts of upper thighs a grizzle of black 
and buff, the annulations becoming finer and the buff paler on the 
thighs and forelimbs; the nape darkest. Feet and lower part. of 
thighs externally mouse-grey, darkest on the feet, the thighs very 
faintly annulated with pale buffy. Hairs on all digits pale smoke- 
grey; the hands dark fuscous, scarcely spotted. Lips and ears, 
sides of neck and body, entire underparts, inner sides of limbs, 
buttocks and lower side of tail smoke-grey. Upper side of tail 
brownish black basally, becoming gradually paler towards the tip 
where it is fuscous. Crown with a black elliptical area, about 50 x 
40 mm., slightly grizzled in the centre. Temples and cheeks buffy 
grey beset with black hairs. Base of fur on neck and_ back 
blackish-brown. 
Bare skin of face red-brown, eyelids bluish-pink, abdomen 
bluish-white, skin about anus plumbeous-blue, scrotum brownish ; 
callosities pale bluish, or yellowish-fleshy. 
Skull and teeth. This race is distinguished by the large 
rostrum and mandible and by the great size of the teeth. In males 
the tooth-rows are only slightly arched and the greatest breadth 
across them is at #2; in females they are extremely arched and 
adjacent posteriorly, and the greatest breadth is at m.! The type 
and a second male (2284) have marked sagittal crests. 
Specimens evanvined. Four adults and one juvenile male; 
two adults, one sub-adult and one juvenile female. 
Remarks, This macaque appears to have some resemblance 
to Macuca validus (Elliot)* stated to have come from Cochin-China 
which also has the crown and upper part of tail black at base, but 
otherwise its colour seems very different, validus being a brighter 
and browner animal with olive tones on the limbs, The skulls 
seem to be much alike, but the teeth of atriceps are larger, though 
the mandible is much shorter (if the measurements given by Elliot 
are correct ; often they are not ). 
* Pitheeus validus Elliot, Ann, & Mag. Nat, Hist. (8) IV p. 252 
(1909), 
JOURN, NAT. HIST, SOC, SIAM, 
