ERYTHROCEBUS S 



1792. Kerr, Animal Kingdom, etc. 



Erythrocebus patas redescribed as Simia (Cercopithecus) 

 ruber nigrofasciatus, and Simla (Cercopithecus) ruber albo- 

 fasciatus. 



1838. Hemprich et Ehrenberg, Symbolce Physicce. 

 Erythrocebus pyrrhonotus first described. 



1840. R. P. Lesson, Species des Mammiftres 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 (nee Gronov.). They are (C.) ruber = E. patas; and 

 (C.) pyrrhonotus. 



1863. Reichenbach, Die Vollst'dndigste Naturgeschichte der Affen. 



Erythrocebus polioph^us and E. circumcinctus first de- 

 scribed under Cercopithecus (nee. Gronov.). 



1905. Matschie, in Sitsungsberichte Gesellschaft Naturforschender 

 Freunde, Berlin. 



Erythrocebus kerstingi; E. zechi; E. baumstarki; and E. 

 LANGHELDi first described under the genus Cercopithecus 

 (nee 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 whitei 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 Kordof an, Darf ur 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. polioph^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. kerstingi and E. zecki, doubtfully separable from it, 



