PYGATHRIX 83 



is quite different, and renders doubtful the value of characters depend- 

 ing upon any peculiar set of such hairs, as they are so easily distorted 

 both in skins and mounted specimens. Hairs on side of head very 

 long passing far beyond ears ; and hairs on flanks long falling below 

 line of body in light specimen ; tail very long, slender. 



Color. Face black ; hairs on forehead black ; top of head, neck, 

 upper parts of body and flanks, arms to elbows, and hind limbs to 

 ankles brownish gray, silvery gray in certain lights, darkest on dorsal 

 region ; long hairs on side of head, silvery brown ; forearms, hands 

 and feet black; under parts silvery gray; tail iron gray, hairs tipped 

 with silvery white ; tip blackish. 



The darker specimen has the forehead blackish brown; top of 

 head and dorsal region blackish brown, hairs tipped with silvery 

 white ; flanks pale brown ; front of shoulders and arms above elbows, 

 and forearms black, hairs tipped with white, giving a grayish aspect 

 to forearms ; middle of shoulders brownish gray ; hind limbs to ankles 

 brownish gray ; hands and feet black ; throat and under parts and 

 inner side of limbs yellowish white ; long hairs on sides of head yellow- 

 ish brown ; tail blackish brown. 



It will thus be seen that one specimen is much darker than the 

 other, more dark brown than silvery brown. Both are marked types! 



Measurements. Total length, 1,074.6; tail, 641.2; foot, 139.7. 

 Skull: total length, 103; occipito-nasal length, 83; Hensel, 74; inter- 

 temporal width, 41 ; zygomatic width, 76 ; palatal length, 39 ; breadth 

 of braincase, 55 ; median length of nasals, 13 ; length of upper molar 

 series, 27 ; length of mandible, 73 ; length of lower molar series, 34. 

 Ex type Paris Museum. Specimen marked "Type." 



Flower states, (1. c.) "when on the Bangpakong River in Siam in 

 March, 1897, we from time to time saw flocks of from 10 to 20 

 monkeys of this species in high trees in patches of jungle. The skin of 

 the face is entirely black, the iris dark brown. A male I shot near 

 Tahkamen measured: — Head and body 23^ in. (or 587 mm.) ; tail 

 with end hair 33 in. (or 838 mm.) ; without end hair ZV/i in. (or 800 

 mm.)" 



"On April 1st, 1897, I bought from a Siamese at Tahkamen a 

 young monkey apparently of this species ; it was evidently very young 

 and was weak and feeble. We tried feeding it at first with a bit of 

 cotton wool soaked in tinned milk and water (fresh milk was not 

 to be had), but soon a young Siamese woman offered to suckle it, and 

 she fed it with her own milk till we left Tahkamen on the 5th April; 



