247 



DESCRIPTION OF A NEW MACAQUE FROM SIAM. 

 J3V C. 1?0IJKN Kl,O.SS, V.7..S. 



Macaca siamica, sp. nov. 



Ti/pfi. A.lult male (skin ami skull) No. 2530/ C.B.K. Collected 

 in the Me I'ing rapids below Cliienginai, North Siani, 850ft, on lltli 

 April 191G by K.G. Gairdner. Oi'iginal No. 320. 



Characters. A small macaque, with dark grej- siioulders, bright 

 oi'hraceous lunip and greyish limbs, of the same group as rhesus and 

 assihiieiisis, with tail about half the length of head and bod}', untufted 

 and evenly furred throughout ( as in the long-tailed " crab eating " 

 macaque). Size and skull characters about as in M. hreincauila^ of 

 H.^inan. to wliicli it is probahlv most nearly related. 



No form of crest ; hair of crown growing straight back from the 

 fVirehead, not lengthened nor radiating ; hairs on sides of head and 

 neck Old}' slightly lengthened ; no mane. Buttocks covered with hair 

 to the edges of the calhisities. 



Colour. A few stiff black hairs above the eyes and numerouo 

 liner black iiairs scattered over the face. 



Top of head to lower back deep mouse-grey, the extremities of 

 the hairs with two ochraceiius-buff and two blackisli annulations, 

 the lumber region slightly tinged with russet; shoulders, fore-limbs 

 and hands intermediate between natural grey and deep niouse-gre}-, 

 the hair of the shoulders faintl}' annulated, of the fore-arms tipped, 

 with very p.de butf. Uuni]) and upper thighs light neutral-grey with 

 the distal portions of the hairs bright oehraceous-orange, which is 

 the dominant colour of those unspeckleil areas; hind-limbs and feet 

 ]iale neutral-grey with a yellowish tinge, their outer sides washed 

 with ])ale ochriiceous-bul!'; bultoeks pale dull buffy. 



Face, sides of neck and nnder|)arts of body pale grey with a 

 slight yellowish tinge most marked on the abdomen. 



Hairs of upper side of tail with liglit neutral-grey bases, those 



1 PithecHK hrac'liijunin (nee 11. .Smilli), Klliot, .Vim. ct Mna;. Nat. Hist.. 

 (8) iv, p. 2.")1 (1909). 



Pitlieciix hnricdii hi-: iil , licvit'W of llic rriiualc-;, ii, p. •2i(> (1913). 



vol.. II, M.w I'.iir. 



