4 MR. C, BODEN KLOSS ON 



tail, 160 ; hind foot, 15-1 mm. 



Measurements of skull: — f^'i-eatest lenglli, 114; basal length, 

 79.5 ; zygomatic breadth, 70 ; maxillarj* tooth-iow exclusive of incisors, 

 37.7 : these dimensions are almost exactl}' identical with those of the 

 two females mentioned above. 



2. Presbytis obscura flavicauda. 



Pt/f/iithiix flaricaudn, Elliot. Proc. U. S. Nat. Miis., XXXVIII, p ?,n2 

 (1910) : id., Review of tlip Priiniitps. HI, p. 50 (lOl'i). 



Semnopitlwcus ohscnruf:. IShuiford (piirtiiii). Faun. Brit. Iiul., Maiinii., 

 p. 41 (1888). 



Pi-cibi/ti.^; ohsciird subsp., IJobiiisoii .niul Kloss, .Tciurii. FihI. Miilay 

 Stiites Mas., V., p. 113 (l'.tl4). 



19 adult, Id adult, Kliao Wang Hip (Lower camp). Peninsular 

 Siam, Sept. 1915 [Nos. 2022, 2023]. 



To examples of P. ohscura from Trang, in Peninsular Siam, and 

 from South Tenasserim, Elliot gave the na.meflai'ictmdii, but though I 

 have examined a number of langurs from the range allotted, including 

 paratypes and topotj-pes of /«vic'Kt(/'(, I have seen no individual . to 

 which the distinguishing characters completelj' apply' : they are, how- 

 ever paler on hind limbs and tail than typical ohscura and therefore 

 the name may stand: there is a good deal of individual variation and 

 the cream-coloured tail attributed to the type is perhaps abnormal. 



The appearance of the Nakon Sritamarat specimens is as 

 follows: — Hairs of crown growing backward and forming a fl it jiad, 

 longest on the occiput. No upstanding crest. 



Male: Cap on head consi)icuously buffy drab grey. General 

 colour above and on sides, brownish-block to black,- paler on the 

 median line: underside of body paler and browner. Fore limbs at 

 elbows hair-brown, hind-limbs and tail smoke grey. Frontal fringe, 

 side of head, hands and feet black: lips and chin with whitish hairs. 

 Skin of e3'elids, lips and chin in lite whitish to bluish pink. 



The female differs considerablj' in having the limbs, tail and 

 other pale areas notably washed with russet and ochraceous; the median 

 dorsal area and the rump paler and the cap more buffy. 



The extent to which individu.il variation may be carried in the 



1. lii'gs from hips pale siiloK-o-grcv, tail rreKiii-riiUniritl. 

 '-. In livinj; .ininials there is often a iiin|ilisli tour in tin' ]i('lai;i> which 

 it is inijiossililt' to dt'soiihf exactly. 



JOURN, NAT. HIST. .SOC. .SUM, 



