10 ERYTHROCEBUS 



of upper molar series, 32; length of mandible, 106; length of lower 

 molar series, 41. Ex Hemprich et Ehrenberg's type in Berlin Museum. 



Eeythrocebus formosus Elliot. 



Erythrocebus formosus Elliot, Ann. Mag. Nat. Hist., IV, 8th Ser., 

 1909, p. 264. 



Type locality. Uganda, particular locality not known. Type in 

 British Museum. 



Genl. Char. Similar to E. pyrrhonotus, but with a much darker 

 rump and tail, more black on shoulders, and under parts of body buff 

 pink, instead of grayish white, with a pale yellow line down center of 

 belly. 



Color. Head, face and cheeks like E. pyrrhonotus, with white 

 patch on end of nose; the black brow line is not distinct between eye 

 and ear, and turns up over the crown from comers of the eyes as in 

 the allied form ; top of head fox red ; head above ear, nape, hind neck 

 and shoulders ochraceous buff, hairs yellow tipped ; lower back to rump 

 and flanks pinkish, hairs tipped with yellow, this last giving a yellow 

 effect to all the upper parts ; rump vinaceous rufous grading into bay at 

 tail and hips ; sides of neck and chest lemon yellow, some hairs tipped 

 with black ; outer side of arms lemon yellow ; inner side of arms and 

 hands white; under parts of body buff pink with a yellow line down 

 center of belly ; chin, throat and center of chest white, this hue narrow- 

 ing to a point on lower part of chest as it is encroached upon by the 

 lemon yellow color on each side ; outer side of thighs in front to knees 

 like rump, on sides pale yellow ; below knees the legs and feet are 

 white; inner side of thighs and legs grayish white; tail bay, slightly 

 paler at tip. Ex type British Museum. 



Measurements. Total length, 1,410; tail, 740; foot, 145, (skin). 

 Ex type British Museum. 



This is a large species resembling E. pyerhonotus on upper parts 

 except on rump which with the tail is much darker, in fact quite a 

 different color; the thighs are also unlike those of E. pyrrhonotus, 

 and the under parts have the sides of neck, chest and arms lemon 

 yellow quite different from the gray chest and yellowish white arms of 

 the allied species, and the under parts of the body are altogether 

 different, of a color difficult to describe, but which I have called 

 buff pink. Unfortunately there is no skull. 



The only species of Erythrocebus dwelling near this one, is 



