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Show 498 MR. D. G. ELLIOT ON THE 1BIDIN/E. [June 5, Spix (I. c.) from Brazil. A specimen in Messrs. Salvin and Godman's collection, obtained in the vicinity of Bogota, would seem to show that it ranged nearly across the continent. It is a bird of rather dull plumage, having but little of the metallic coloration which renders many of the species of this group so beautiful. I have not been able to learn any thing regarding the economy or habits of the species. Sides of head, including the eye and throat, bare of feathers, skin red ; general plumage very dark olive-green, with purple reflections on the neck ; wings dark olive-green, primaries dark rufous brown, secondaries dark purple ; tail dark grass-green, with blue reflections. Total length, without bill, 27 inches; wing 16, tail ll|, bill along culmen 6^, tarsus 2|. 13. THERISTICUS CAUDATUS. Courly a col blanc de Cayenne, Buff. Pl. Enl. no. 976. Scolopax caudatus, Bodd. Tabl. Pl. Enl. Daub. (1733) p. 57. Black-faced Ibis, Lath. Gen. Syn. (1783) vol. iii. p. 108, pl. 79. White-necked Ibis, Lath. Gen. Syn. (1783) vol. iii. p. 109. sp. 6. Tantalus melanopis, Gmel. Syst. Nat. (1788) p. 653. sp. 19; Lath. Ind. Orn. (1790) vol. ii. p. 704. sp. 8. Tantalus albicollis, Gmel. Syst. Nat. (1788) vol. i. p. 652, sp. 20, juv.; Lath. Ind. Orn. (1790) p. 904. sp. 6 ; Vieill. Enc. Me'th. (1823) torn. iii. p. 1146. Mandurrea 6 curucdu, Azara, Apunt. Hist. Nat. Parag. iii. p. 189. sp. 5. Ibis albicollis, Vieill. Nouv. Diet. Hist. Nat. (1819) vol. xvi. p. 17, juv.; Less. Trait. Orn. (1831) p. 567, sp. 7. Ibis melanopis, Vieill. Nouv. Diet. Hist. Nat. (1819) vol. xvi. p. 20; id. Ency. Me'th. (1823) torn. iii. p. 1148 ; Wagl. Syst. Av. (1827) sp. 17; Darw. Voy. Beag. vol. iii. p. 128; Schleg. Mus. Pays-Bas (1863) livr. 4, p. 7 ; Sclat. & Salv. Proc. Zool. Soc. (1869) p. 600; Hudson, Proc. Zool. Soc. (1872) p. 549. Theristicus melanopis, Wagl. Isis (1832) p. 1232; Bon. Consp. Gen. Av. (1857) vol. iii. p. 155; Cunningh. Ibis (1868) p. 126; Newton, Ibis (1870) p. 502; id. Proc. Zool. Soc. (1870), p. 56, pl. iv. fig. 8 (egg); Taczan. Proc. Zool. Soc. (1874) p. 562. Theristicus melanops, Fraser, Proc. Zool. Soc. (1843) p. 117. Theristicus albicollis, Bon. Consp. Gen. Av. (1857) vol. iii. p. 154. sp. 2. Vanduria de Inverno, Hudson, Proc. Zool. Soc. (1871) p. 261. Hab. Chili (Bridges); Pitumarca, Peru (Whitely); Buenos Ayres (Hudson); Rio Negro (Hudson); Straits of Magellan (Cunningham). Mr. Hudson states that this bird appears in M a y in Buenos Ayres, and is very common on the pampas about latitude 38°. It frequents dry ground, covered with loose grass or low cardoon bushes, and feeds in flocks of from forty to fifty individuals. They swallow the larvae of the large horned beetle, quantities of which insect are often found in then* stomachs. About sunset they take wing, uttering loud cries, |