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Show 1876.] MR. E. R. ALSTON ON THE GENUS DASYPROCTA. 349 Mr. Waterhouse united the Peruvian Agouti with D. cristata ; but it is a well-marked species, easily distinguishable by the fur being annulated only near the tip. According to Von Tschudi it inhabits the forests and " ceja " regions of Eastern Peru, to an altitude of 6000 feet above the sea. The Society has received living specimens from Colon, the exact locality of which is uncertain ; and Mr. E. Gerrard, Jun., has kindly lent me two fine examples collected by M r . Salmon at Medellin, near Antioquia, N ew Granada. It is probable that the Agouti obtained by Mr. Fraser, at Palhatanga, Equador, which Mr. Tomes referred to D. caudata (D. azara)* was really of this species. 4. D. FULIGINOSA. Dasyprocta fuliginosa, Wagler, Isis, 1832, p. 1220 (descr. orig.) ; Waterhouse, M a m m . ii. p. 385. Dasyprocta nigricans (Natterer), Wagner, Wiegm. Arch. 1842, p. 362 (descr. orig.); Wagner, Suppl. Schreb. Saugeth. iv. p. 46. Dasyprocta nigra, Gray, Ann. Nat. Hist. x. p. 264 (1842, descr. orig.), Voy. ' Sulphur,' p. 36, pl. xvi. Fur ringed with brownish or sooty black and pure white; rump hoary, the very long and soft hairs being broadly tipped and often ringed at the base with white. Length about 23 inches ; hind foot 4*75 inches. Hab. Amazonia ; Peru ; Ecuadort. Wagner and Waterhouse have shown that the above are merely synonyms of this large dark species. Wagler described it from specimens collected on the Brazilian Amazons ; and Natterer obtained it at Borba and on the Rio Nigro. Mr. Sclater has a skin collected by Mr. E. Bartlett, at Chamicuros, on the Peruvian Amazons ; and a specimen obtained in Ecuador, by Mr. Fraser, was referred to this species by Mr. Tomes. 5. D. MEXICANA. Dasyprocta mexicana, De Saussure, Rev. et Mag. de Zool. (2e ser.), xii. p. 53 (1860, descr. orig.). Fur ringed with black and pure white, the rump black, the long hairs being black throughout their length, throat and belly almost white. Average length 17 inches; hind foot 3*50 inches. Hab. Mexico. As remarked by its first describer, this species most resembles D. fuliginosa. It differs, however, in its much smaller size, its darker coloration, and in the less elongated hairs of the rump being black throughout from the base to the tip. It is a native of the " hot zone " of Mexico; and a specimen is now living in the Society's Gardens, presented by Mr. Marckmann de Lichtabel, in February 1874J. 6. D. AZARCE. (Plate XXIX.) Dasyprocta azara, Lichtenstein, Doubl. Zool. Mus. Berl. p. 3 * P.Z. S. 1860, p. 216. t Cf. P.Z. S. 1860, p. 216. X Cf. P. Z. S. 1874, p. 683. |