ERYTHROCEBUS 5 
1792. Kerr, Animal Kingdom, etc. 
ERYTHROCEBUS PATAS redescribed as Simia (Cercopithecus) 
.ruber nigrofasciatus, and Simia (Cercopithecus) ruber albo- 
fasciatus. 
1838. Hemprich et Ehrenberg, Symbole Physice. 
ERYTHROCEBUS PYRRHONOTUS first described. 
1840. R. P. Lesson, Species des Mammiféres Bimanes et Quadru- 
manes. 
The species of the genus EryTHROCEBUS in this work, as is the 
case with nearly all Authors, are placed in the genus Cerco- 
pithecus (nec Gronov.). They are (C.) ruber = E. patas; and 
(C.) PYRRHONOTUS. 
1863. Reichenbach, Die Vollsténdigste Midwr gesthichie der Affen. 
ERYTHROCEBUS POLIOPHZuUS and E. ciIRCcUMCINCTUs first de- 
scribed under Cercopithecus (nec. Gronov.). 
1905. Matschie, in Sitzungsberichte Gesellschaft Naturforschender 
| Freunde, Berlin. 
ERYTHROCEBUS KERSTINGI; E. ZECHI; E. BAUMSTARKI; and E. 
LANGHELDI first described under the genus Cercopithecus 
(nec Gronov.). 
1906. O. Thomas, in Annals and Magazine of Natural History. 
ERYTHROCEBUS SANNIO first described as Cercopithecus sannio. 
1909. D.G. Elliot, in Annals and Magazine of Natural History. 
ERYTHROCEBUS FORMOSUS and E. ALBIGENIS first described. 
1910. N. Hollister, in Proceedings of the United States National 
Museum. 
ERYTHROCEBUS WHITE! first described. 
GEOGRAPHICAL DISTRIBUTION OF THE SPECIES. 
Restricted to the African Continent, the members of EryTHROCE- 
BUS are about equally divided between the eastern and western por- 
tions. Beginning in the northeast we find E. aLBIGENIs in the Egyptian 
Soudan. In Kordofan, Darfur and Sennaar, E. pyrRHONOTUS occurs; 
while from the Bahr el Ghazal on the west, and in Abyssinia to an 
elevation of 3,000 feet, E. potiopHz#us is found. In Uganda E. For- 
MOSUS is met with, its exact position as yet unknown; while in Masai- 
land, British East Africa, E. BAUMSTARKI ranges, and on the Nzoia 
River, Guas Ngishu Plateau in the same Protectorate, E. wHITEI has 
been obtained. In West Africa, in Senegal E. patas is found, while 
in Togoland E. xerstinc1 and E. zecx1, doubtfully separable from it, 
