(1) Ornithological Notes from the Neighbourhood of Buenos Ayres. Ibis, 1876, p. 157. [Notes made during his first five months' residence at Belgrano, five miles north-west of Buenos Ayres. About 70 species are mentioned.] (2) Notes on the Birds of the Province of Buenos Ayres. Ibis, 1877, p. 166, and 1878, p. 58. [Notes made principally at Baradero, 90 miles W.N.W. of Buenos Ayres. In the first paper 144 species are mentioned and _Porzana spiloptera_ is described and figured as new. In the second 47 species, mostly additional, are noticed.] (3) Notes on some Birds observed in the Chupat Valley, Patagonia, and in the Neighbouring District. Ibis, 1877, p. 27. [Durnford first visited Chupat, on the river of the same name, in Eastern Patagonia (43° 20′ S. lat.), in October 1876; 62 species of birds are noted and commented upon.] (4) Notes on the Birds of Central Patagonia. Ibis, 1878, p. 389. [Durnford's second visit to Chupat extended from September 1877 to April 1878. The list of birds is now extended to 89, and it is not believed that many more will be found to occur in the district.] (5) Last Expedition to Tucuman and Salta. Ibis, 1880, p. 411, pl. xii. [This is an almost verbatim copy of Durnford's journal in 1878, during his expedition to Tucuman and Salta. Many notes on birds are inserted. Durnford died at Campo Santo, in the province of Salta, on July 13th, 1878. The collection made on this occasion was worked out by Mr. Salvin (Ibis, 1880, p. 351, see below).] GIBSON, ERNEST. Mr. Ernest Gibson, who has been resident in the Argentine Republic since about 1873, is an excellent observer in the field, and has written two very interesting papers on our subject, from which we have quoted largely in this work. (1) Ornithological Notes from the Neighbourhood of Cape San Antonio, Buenos Ayres. Ibis, 1879, p. 405; 1880, pp. 1, 153. Mr. Gibson's notes, which relate to 61 species, are in most cases very full and contain particulars of the breeding-habits, eggs, and nests. Cape San Antonio is on the Atlantic coast, south of Buenos Ayres (36° 20′ S. lat.). (2) Notes on the Birds of Paisandú, Republic of Uruguay. (Communicated by J. J. Dalgleish.) Ibis, 1885, p. 275. Field-notes on 52 species from this locality, which Mr. Gibson visited in 1883. The specimens were sent to Mr. J. J. Dalgleish and named by P. L. S. GIEBEL, Prof. C. (of Halle, Germany). Einige neue und wenig bekannte argentinische Vögel. Zeitschr. f. d. ges. Naturwiss. xxxi. p. 11 (1868). In this paper the author described two new Bolivian species and two Argentine species (_Troglodytes fasciolatus_ and _Geobamon rufipennis_), from specimens in the Halle Museum received from Dr. Burmeister. GOULD, JOHN.