i>jjecies and ijubspecits vf Monkiys. 271 



P. rhiunis in its palf Icf^s and };ci)cnil colour of the upper 

 parts, ntul from /'. cana Ijy lacking the pale occipital crest 

 and black Icjjs. 



Preabytis maryarita, sp. n. 



Type locality. Lang Hian, Annani. 



Colour. Forehead covered by 1 -ng, stiff, erect black hairs; 

 \vhiskcrs diiectid backwards, long, extending far beyond the 

 caiN, greyish white ; sj)ace around eyes pale, apparently flesh- 

 colour in life ; rest of face black, with a line of whitish hairs 

 on upj)er lip; a bar of silvery white hairs goes on each side 

 of the head from above and behind ears to the occiput, where 

 they n>cet and form a point at the nape; top of head, entire 

 upper parts of body, outer sulcs of arms to elbows, and legs 

 from hips to ankles, except from edge about knees which is 

 black, bright bluish silvery grey, the hairs being bluish grey 

 from the root and tipped w ith silvery white ; forearms, hands, 

 and feet jet-blaek : chin, throat, under parts of body and 

 inner side of arms and legs sparsely covered with white 

 hairs; flanks paler silvery grey than the upper parts; tail 

 silvery grey. 



Measurements. Total length 1315 ram.; tail 77~) ; foot 

 127 (skin). Skull : total length 916 ; occipito-nasal 

 length 77 ; intertemporal width 40" 1 ; width of brain- case 

 52'4 ; hensel 5() ; zygomatic width 61 '5 ; length of nasals 

 11 "6; palatal length 286; len^-th of upper molars series 

 27'7; lengtii of mandible 6ri; length of lower molar 

 series 823. 



Type in British Museum, no. 8. 11. 1.5. 



This is a very handsome monkey with its brilliant pearl- 

 grey shining pelage, quite different from any other species 

 of the genus. The colouring varies greatly according to the 

 light, which sometimes easts shadows on the grey that are 

 almost black in their intensity. The unique type was 

 obtained in Annam by Dr. Vassal. 



Presbytia crepuscula, sp. n. 



Type locality. Mooleyit, British Burma. Altitude 5000 

 feet. 



Gen. char. Hair on head long, but no elevated crest ; 

 colour pale; tail long; stiff hairs above eyes, erect in the 

 centre, standing out at right angles on sides. 



Colour, l^yelids and upper lip flesh-colour ; forehead and 

 temples black ; rest of head above, nape and hind neck, 

 shoulders and nrms to elbows on outer side, entire upper 



