250 5IB. p. L. SCLATBB OX THB [Mur. 14, 



Patas (Simla rubra), F. Cuv. Hist. Nat. Mamm. i. pi. 25 

 (1820). 

 ' Chlorocehus ruber. Gray, Cat. Monk. B. M. p. 25 (1870). 



Hab. West Africa : Senegal (Mus. Lugd.). 



The Patas is subject to a certain amount of individual variation, 

 and I was at one time of opinion that it might be possible to 

 distinguish two forms of this species (c/. P. Z. S. 1874, p. 664). 

 It is much more common in captivity than the Nisnas. 



17. Cehcopithecits ptbehonottts. 



CercopitJiecus pyrrlwnotus, Hempr. et Ehr. Symb. Phys. pi. x. ; 

 Geoffr. Diet. univ. d'Hist. nat. iii. p. 307 ; Wagn. Siiug. v. p. 42 ; 

 Scl. P. Z. S. 1871, p. 623 ; id. List Vert. (1883) p. 8 ; Schleg. 

 Mus. P.-B. Sim. p. 84. 



Cercojntheeus ruber, Eiipp. Neue Wirbelth. p. 8. 



msnas, F. Cuv. Hist. Nat. Mamm. i. pi. 27 (1830). 



Hab. Kordofan and Darfonr (Hiippell) ; SomaHland (Soc. Zool. 



riv.). 



We have received altogether seven examples of the Nisnas, 

 which is quite distinct from the Patas when seen alive. A fine 

 male, presented Sept. 29th, 1882, by Mrs. P. Dixon, was stated to 

 have been brought from Somaliland. 



Sect. D. Cercopitheci melanochiri. 

 The nine species referred to this section, all of which have 

 the arms and legs black or dark cinereous, may be diagnosed as 

 follows: — 



A. Pectore albo. 



a. Striga femoral! alba 18. mona. 



b. Striga femorali nulla. 



r Dorso toto concolore ; ano rufo 19. albigularis. 



\ Dorso postico cum ano nigro 20. campbelli. 



B. Pectore cinereo. 



c. Maculis auricularibus nullis. 



f Dorso concolore 21. samango. 



\ Dorso postico brunneo 22. moloneyi. 



d. Macula utrinque ad aures rubra 23. stairsi. 



O. Pectore rubro 24. erythrogaster. 



D. Pectore nigro. 



Striga femorali alba ; f ronte nigro 25. neglectus. 



Striga femorali nulla ; froute albo cincta 26. Icucamxiyx. 



18. Cekcopitiu)cus mona. 



Simla mona, Schreb. Saug. i. p. 97, t. xv. (1775). 



OercopitJiecus mona, Erxl. Syst. Eeg. An. p. 32 (1777) ; Martin, 

 M. An. p. 527 ; Wagn. Saug. Suppl. v. p. 47 (1855) ; Gray, P. Z. S. 

 1868, p. 182 ; id. Cat. Monk. B. M. p. 22 (1870) ; Scl. List Vert. 

 (1883) p. 9 ; Schleg. Mus. P.-B. vii. p. 80 (1876). 



Mone (Cercopithecus mona), F. Cuv. Hist. Nat. Mamm. i. pi. 15 

 (1819). 



Bab. West Africa : Cameroons {Mas. Lugd.). 



The Mona is easily recognized by the white patch on the thighs, 

 on each side of the tail, and the white band on the forehead. It 



