EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 23 
Mr. Heller examined the type of this monkey in Berlin and made the 
following notes, which are on file in the National Museum: 
Cercocebus galeritus Peters. Type, 5546 ¢ Berlin Mus. Mitole, Tana River, British 
East Africa. Fischer coll. Skin mounted; faded slightly, but in good condition. 
Skull perfect; old, molars much worn. Color grayish olive; top of head blackish. 
Skull: condylo-incisive length, 100; greatest length, 127; zygomatic breadth, 84; 
interorbital breadth, 9.2; postorbital breadth, 46.5; upper tooth row, including 
canine, 40; width palate at second molar, 22; length of mandible, 90. Fairly closely 
allied to agilis of central Congo; not close to the albigena group of Uganda. 
Genus ERYTHROCEBUS Trouessart. 
1897. Erythrocebus TRovEssartT, Cat. Mamm., p. 19. (2. patas.) 
Several species of the hussar monkey have been recognized from 
the region covered by this report. The earliest described form is 
Erythrocebus pyrrhonotus (Hemprich and Ehrenberg),’ from Dar- 
Fur. The next is E. poliopheus (Reichenbach),’ from Fazogli, on 
the Blue Nile near the border of Abyssinia. Almost hopeless con- 
fusion for future workers in the Nile monkeys of this group has been 
brought about by the description by Elliot of two additional species, 
both based on zoological park specimens of uncertain history and 
_ probably of abnormal coloration. These are Erythrocebus albigenus,' 
the type a specimen formerly living in the Giza Zoological Gardens, 
and supposed to have come from Egyptian Sudan; and £. formosus,’ 
based on the skin of a specimen that died in the Zoological Gardens in 
London, and labeled ‘‘Uganda.’’ The types of both of these alleged 
species are in the British Museum, but not until good series of wild- 
killed specimens from all parts of Sudan are available for study will 
it be possible, by comparison with these types and with due allow- 
ance for their changed colors, to deal satisfactorily with the names. 
Mr. Heller examined all the available material in the larger museums 
of Europe and came to the conclusion that formosus and albigenus are 
synonyms of poliopheus. Forms from British East Africa and 
German East Africa, with definite type-localities, have been described 
as noted below. 
1Symb. Phys., pl. 10. 1838. 
2 See Anderson, Zool. Egypt, Mamm., p. 26. 1902. 
3 Die vollstiind. Naturg. Affen, p.122. 1863. 
4 Ann. and Mag. Nat. Hist., ser. 8, vol. 4, p. 265. September, 1909. 
5 Ann. and Mag. Nat. Hist., ser. 8, vol. 4, p. 264. September, 1909. 
