MAMMALS COLLECTED IN SIAM. 343 
al thighs very silvery DP. ec. germaini. 
b1 thighs less silvery, blackish P. c. mandibularis, 
B. Very silvery, base of fur neutral-grey; 
whiskers and throat silvery P. ¢. koratensis. 
C. Paler than A, darker than B: whiskers inter- 
mediate between Aa and Ab: throat 
grizzled, P. ¢. ultima. 
( Borneo and Malay States ). 
4. Macaca nemestrina indochinensis, subsp. nov. 
Macaca anlamanensis, Kloss, P. Z.8. 1916, p. 30; id. Journ. N. H. 
Soc. Siam, IT, p. 2 (1916). 
Type. Adult male (skin and skull) No. 2148/C.B.K. Col- 
lected at Lat Bua Kao, East Siam on 12th October 1916. 
Characters. Like Macaca nemestrina adusta Miller, of South 
Tenasserim* but of duller colour, lacking the russet hue of the 
latter on back and shoulders, facial ruff less annulated, buttocks and 
sub-caudal region paler; but with a more distinct dark line down 
the back. 
Colour. A whorl of hairs on the vertex. A few stiff black 
hairs above the eyes; crown blackish brown sharply margined in front 
and narrowing to a point on the forehead, but fading on the occiput 
into the colour of the nape: sides of face, temples and whiskers 
pale greyish buff; anterior parts of the ear-ruffs tipped with black- 
ish brown. Nape, shoulders, outer sides of upper arms and anterior 
half of back mummy-brown annulated with ochraceous; posterior 
half of back duller and darker, mummy-brown annulated with buffy ; 
from behind the shoulders an indefinite median line of clove-brown 
continued to the tail which is blackish brown on the upper surface, 
entirely so at the tip and pale isabelline below elsewhere. Forearms 
markedly annulated buff and fuscous: hindlimbs, which are 
browner, like the rump but the grizzling very faint on the shins. 
Buttocks and an indistinct tuft on either side of the tail-root buffy 
white. Fore-digits clove-brown and hindfeet largely so. Ears white 
hair above and behind them, throat, chest and inner sides of arms 
greyish white. Abdomen pale brownish grey. 
* Proc. U. 8. Nat. Mus, xxix, p. 559, pls. xiii-xvii, (1906), 
VOL. LI, NO. 4, 1919. 
