the TAOiffurs i'nltahUi»<i Ceylon. 509 



a distinct species ; but even assuniiiif^, witli Ijlanford, it to 

 be a form ofvetiiiuf:, tlicn it is clear that thersites is a sub- 

 species pert'ectly distinct from any of the forms A, I)^ and C 

 mentioned in tlie above scheme. 



It would ap])ear, therefore, that form C has not liitherto 

 attracted the attention of the systematist, and it is descriljcd 

 below as a new subspecies, P. v. pJiUlipsi. The characters 

 of the three subspecies now recognised may be set forth as 

 i'ollows : — 



1. Pithecus vetulus vetulus, Erxl. 



Hair of crown directed backwards, not radiating, wliiskers 

 very long, concealing the lower part of the ears. Black 

 supraorbital hairs but moderately developed. Hair of body 

 of moderate length. 



General colour of body and limbs black. Crown of head 

 rufous or yellowish brown^ more or less strongly contrasting 

 Avith the shoulders. Whiskers white, but sometimes tinged 

 with yellow. A conspicuous silvery-white patch, of sub- 

 triangular form, upon the rump ; the base of tlie triangle 

 bordering the callosities and involving more or less of the 

 root of the tail. Buttocks, hinder parts of loins, and outer 

 surfaces of thighs frosted conspicuously by the silvery hair-tips. 

 Lower limbs and upper surfaces of hands and feet black. 

 Naked parts of face, callosities, palms, and soles black. Basal 

 half or two-thirds of tail dark grey above and below, its 

 distal portion white or yellowish, wdth a more or less well- 

 developed terminal penciL 



Skull showing a considerable difference in size between 

 the two sexes : the occipito-basilar length ranging between 

 88 and 93"6 mm. in adult males, and between 81*6 and. 

 84'5 mm. in adult females. Facial portion short and steep, 

 making with the horizontal plane passing through the 

 external occipital protuberance and the gnathion an angle 

 which ranges between 45^ and 48° in adult males and between 

 49° and 58° in adult females. 



For external and cranial measurements, see tables at pp. 513 

 and 514. 



Hab. S.W. Ceylon; " wet area '' (average rainfall 100"- 

 200" per annum). 



Material e.vamined. — Twelve from the following localities : 

 Anasigalla, Matugama, Kalutara District (collected by 

 Mr. W. W. A. Phillips), 7 ; Kalutara District (Colombo 

 ]\Iuseum), 3; ^^ Pasdon Corola '' (B.^1., presented by 

 Colombo Museum), 1 : Kottawa, S.P. (Bombay Nat. Hist. 

 Soc. Mamm. Surv.), 1. 



