LASIOPYGA 311 



Genl. Char. Similar to L. albigularis but nose and upper lips 

 white; under surface and limbs black. 



Color. Fore part and sides of head from beneath eyes, and sides 

 of neck thickly speckled with black and white; no defined band on 

 forehead; top of head and nape black sparsely speckled with white; 

 hind neck, band across back at base of neck, shoulders, outer and inner 

 sides of arms and legs, hands and feet jet black ; upper parts and 

 sides of body speckled black and white, the blue gray basal portion of 

 the hairs imparting a gray tinge over all ; upper lip covered with short 

 white hairs ; chin grayish white ; throat yellowish white ; entire under 

 parts jet black; tail at base black speckled with white, remainder jet 

 black. 



Measurements. Total length, 1,300; tail, 700; foot, 145; ear, 30. 

 Skull: total length, 116.4; occipito-nasal length, 95.6; Hensel, 81.3; 

 intertemporal length, 41.4; zygomatic width, 75.6; palatal length, 81.9; 

 median length of nasals, 23.9 ; width of braincase, 58.3 ; length of upper 

 molar series, 46.4 ; length of mandible, 78.2 ; length of lower molar 

 series, 32.9; length of upper canines, 21.2. Ex specimen in British 

 Museum from Kaffa, 6. 11. 1. 1. 



Unfortunately during my visit to the Florence Museum, the Di- 

 rector, Signor Giglioli, was absent from the city and I was not able to 

 find the type of this species, but the specimen above described, obtained 

 at the same place as the type, is a co-type, and therefore is an accept- 

 able representative of the species. 



Lasiopyga opisthosticta (Sclater). 



Cercopithecus opisthostictus Sclat., Proc. Zool. Soc. Lond., 1893, 

 p. 725; Forbes, Handb. Primates, II, 1894, p. 72; Pocock, 

 Proc. Zool. Soc. Lond., II, 1907, p. 694. 



RUMP-SPOTTED GUENON. 



Type locality. Lake Mweru, British Central Africa. Type in 

 British Museum. 



Color. Face dark brown; upper lip covered with short white 

 hairs; forehead, and sides of face and neck thickly speckled with 

 white and black ; a bar across the forehead being nearly all white ; 

 top, and back of head, nape, and back of neck black speckled with 

 white, but less profusely ; band across upper back at base of neck jet 

 black, sparsely speckled with white on middle of back ; outer and inner 

 sides of arms, and hands jet black ; upper part and sides of body gray 

 speckled with black and buflf; upper edge of thighs, legs and feet jet 

 black ; rest of thighs and legs iron gray, grizzled, similar to the upper 



