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Show 1893.] MONKEYS OF THE GENUS CERCOPITHECUS. 249 Grivet by the rust-red hairs on the space below the root of tail." (Martin, op. cit.) The Vervet is one of the commonest species of this genus brought to Europe alive. 14. CERCOPITHECUS PYGERYTHRUS. Vervet (Simia pygerythra), F. Cuv. Mamm. i. pi. 23 (1821). Cercopithecus pygerythrus, Desm. Mamm. Suppl. p. 534 (1820) Geoffr. Cat. Prim. p. 21; Wagn. Siiug. v. p. 39 ; Peters, Reise n. Moss., Siiug. p. 4 (Zambesia) ; Thomas, P. Z. S. 1885, p. 219 (Kilimanjaro). Cercopithecus rufo-viridis, Sci. List Vert. (1883) p. 8 ; id. P.1860, p. 420. Hab. East Africa, from Mozambique to Kilimanjaro. If I am correct in identifying this species with the true C. pygerythrus it is a very close ally of the Vervet (C. lalandii), and differs mainly in its yellowish-green colour above. I have until recently called this species C. rufo-viridis, and am not now quite clear that it is C. pygerythrus; but I am inclined to think so from what Wagner says (I. s. c). 15. CERCOPITHECUS ERYTHRARCHUS. Cercopithecus erythrarchus, Peters, Reise n. Moss., Siiug. p. 1, pi. 1; Schleg. Mus. P.-B. Sim. p. 77 ; Kirk, P. Z. S. 1864, p. 649 (Zambesi); Reuvens, Zool. Gart. xxx. p. 207 (Zambesi) ; Oudemans, Zool. Gart. xxxi. p. 267. Hab. Mozambique (Peters) ; Lower Zambesi (Kirk). Apparently quite distinct from the preceding species, being without any white frontal band and having the lower rump rufous. W e have a young living specimen now " on deposit" in the Monkey-house which, I suspect, belongs to this species. It is said to have been obtained on the Congo. Sect. C. Cercopitheci erythronoti. Of this section, which is at once recognizable by members of it being bright rufous above and white beneath, only two species are known to me, which may be discriminated as follows :- A. Supra ruber flavido mixtus ; naso nigro 16. patas. B. Supra ruberrimus; naso albo 17. pyrrhonotus. 16. CERCOPITHECUS PATAS. Simia patas, Schreb. Saug. t. xvi. (1774). Cercopithecus patas, Erxl. Syst. R. An. p. 34; Schleg. Mus. P.-B. vii. p. 84 (1876); Sci. List Vert. (1883) p. 8. Simia rubra, Gm. Syst. Nat. i. p. 34 (1788). Cercopithecus ruber, Geoffr. Ann. d. Mus. xix. p. 96 (1812) ; Diet. univ. d'Hist. nat. iii. p. 307; Martin, M . An. p. 509; Wagn. Siiug. Suppl. v. p. 42 (1855); Sci. P. Z. S. 1874, p. 664; id. List Vert. (1883) p. 8. |