LASIOPYGA 319 



Cercopithecus stampHii Jent., Notes Leyden Mus., X, 1888, p. 10 ; 

 Sclat., Proc. Zool. Soc. Lond., 1893, p. 257; Matschie, 

 Sitzungsb. Gesell. Naturf. Freunde, Berlin, 1893, pp. 101, 

 215; Forbes, Handb. Primates, II, 1894, p. 50. 



MARTIN'S GUENON. 



Type locality. "Fernando Po." 



Geogr. Distr. Guinea from the delta of the Niger, Asabe, River 

 Niger, (Rudkin) ; Liberia to Cameroon and Sette Cama, West Africa. 



Genl. Char. Distinguished from L. nictitans by a whitish breast 

 and inner side of arms. 



Color. Hairs on forehead speckled black and yellow ; crown of 

 head speckled buff and black ; nape and hind neck covered with jet 

 black hairs, beneath which the hairs are speckled white and black, and 

 this speckling continues to below shoulders ; lower back and rump 

 speckled buff and black ; flanks grayer, hairs speckled white and black 

 on apical half; outer side of arms to elbows, and whole of forearms, 

 hands and feet, jet black ; outer side of legs black speckled with white, 

 the speckling growing less below the knee ; chin, throat, upper part of 

 chest and inner side of arms to elbows, and legs to knees white ; rest of 

 under parts pale gray; tail black speckled with white for four fifths 

 its length, remainder jet black; large white spot on nose. Ex type 

 British Museum. 



Measurements. Total length, 1,080; tail, 420; foot, 115. No 

 skull. Ex type British Museum. 



Subgenus 4. Neocebus. 



Tail red or mostly red ; nose spot usually present. 



A. Pale blue transverse stripe on upper lip. 

 0. Without rufous brow band. 



a.' Tail coppery red, hairs on ears white L. cephus. 



b.' Tail above like back, not red, hairs on 



ears yellowish L. cephodes. 



b. With rufous brow band L. inobservata. 



B. No blue stripe on upper lip. 



0. Nose patch white L. sclateri. 



b. Nose patch red L. erythrotis. 



Lasiopyga CEPHUS (Linnaeus) . 



Simia cephus Linn., Syst. Nat., I, 1758, p. 27 ; I, 1766, p. 39 ; Bodd., 

 Elench. Anim.. 1784, p. 159. 



