INTRODUCTION xcix 



443. Erytiirocebus formosus. Uganda. 



444. Erythrocebus polioph^us. Abyssinia; Bahr el Ghazal, 



Soudan. 



445. Erythrocebus whytei. Guas Ngishu Plateau, British East 



Africa. 



446. Erythrocebus kerstingi. Togoland, West Africa. 



447. Erythrocebus zechi. Togoland, West Africa. 

 44S. Erythrocebus langeldi. Cameroon, West Africa. 



449. Erythrocebus albigenis. Egyptian Soudan, East Africa. 



450. Erythrocebus sannio. Lake Chad, Nigeria. 



451. Erythrocebus baumstarki. Masailand, East Africa. 



452. Erythrocebus circumcinctus. Locality unknown. 



Pygathrix. 



Range of the Genus. 



Pal.earctic and Oriental Regions. 



Range of the Species. 



453. Pygathrix melanolopha. Island of Sumatra. 



454. Pygathrix nobilis. Island of Sumatra ; locality unknown. 



455. Pygathrix rubicunda. Northern to South eastern Borneo. 



456. Pygathrix carimat^. Telok Edar, Karimata Islands. 



457. Pygathrix frontata. South eastern Borneo. 



458. Pygathrix nudifrons. North west Borneo. 



459. Pygathrix cruciger. Western Borneo. 



460. Pygathrix chry'somelas. Western Borneo. 



46L Pygathrix sum.'\trana. Ophir Mountain, Sumatra 



462. Pygathrix batuana. Batu Islands. 



463. Pygathrix percura. Eastern Sumatra. 



464. Pygathrix femoralis. Tenasserim, Malay Peninsula, and 



Sumatra. 



465. Pygathrix melamera. North Burma. 



466. Pygathrix barbel Province of Ye, Tenasserim, Malay Pen- 



insula. 



467. Pygathrix holotephrea. Locality unknown. 



468. Pygathrix phayrei. Arakan ; probably northern Tenasserim. 



469. Pygathrix flavicauda. Trong. Lower Siam. 



470. Py'g.\thrix robinsoni. Trong, Northern Malay Peninsula. 



471. Pygathrix obscura. Tenasserim, Malay Peninsula. 



