LASIOPVGA 297 



Subgenus 1. Allochrocebus. 



General color various, size small. 



KEY TO THE SPECIES. 



A. Head black speckled. 



a. Brow band indistinct, white ; ruff on sides of 



throat white L. I'hoesti. 



b. Brow band ochraceous rufous ; no ruff on sides 



of throat L. insolita. 



Lasiopyga l'hoesti (Sclater). 



Cercopithecus I'hoesti Sclat., Proc. Zool. Soc. Lond., 1898, p. 586, 

 pi. XLVIII ; Pocock, Proc. Zool. Soc. Lond., II, 1907, p. 714, 

 pi. XLI, fig. 2. 



VHOEST'S GUENON. 



Type locality. Congoland. Type in British Museum. 



Geogr. Distr. Unknown. 



Genl. Char. Remarkable for its black head and elongate white 

 ruff on sides of throat. 



Color. Face black; scattered black hairs on nose and lips; sides 

 of face covered with short white and black hairs, longest in a line below 

 eyes, and running back to whiskers ; head, neck, space between shoul- 

 ders, and sides of body jet black speckled with white; very narrow, 

 rather indistinct white line on forehead ; sides of head sparsely 

 speckled with white, none at all about temples ; dorsal region, from 

 between shoulders to tail, speckled black and ochraceous rufous ; 

 shoulders, arms, legs, hands, feet, under parts of body and inner side 

 of limbs jet black; whiskers long, directed upwards and backwards 

 concealing the ears, and together with the front, sides of neck and 

 throat, continuing to a point on the chest, white with a slight tinge of 

 gray; nose black; tail, speckled white and black all around, tip black. 

 Ex type British Museum. 



Measurements. Total length, 1,080; tail, 600; foot, 110. Skull 

 total length, 98; intertemporal width, 44.7; occipito-nasal length, 8L6 

 Hensel, 65; zygomatic width, 64.4; median length of nasals, 15.7 

 palatal length, 36.5 ; length of upper molar series, 27.5 ; length of man- 

 dible, 63 ; length of lower molar series, 32.2. Ex type Gardens of the 

 Zoological Society of London. 



