Kittlitz, who visited the largest of the Bonin Islands in May, 1828, obtained a number of specimens, of which some are in St. Petersburg, two in Frankfurt-a.-M., one or two in Leyden, and, I believe, in Paris. {10} These seem to be all the specimens known in European museums. Mr. Seebohm's collector, the late Holst, failed to obtain it, and Mr. Alan Owston's men, who several times went to the Bonin group to obtain it, and who were promised good prices for specimens, did not get one. I am therefore convinced that for some unknown reason this bird became extinct, though there is still the possibility that the recent collectors did not collect on the main island of the group, which alone was visited by Kittlitz. Kittlitz tells us that he found it in the woods along the coast, but not numerous. That it keeps concealed, is very phlegmatic, and is so little shy that one is obliged to go back for some distance, before shooting, if one wishes to preserve the specimen. Kittlitz saw it but seldom on high trees, mostly on the ground. Its frequently heard note is a very fine piping sound. In the crop and stomach small fruit and buds of one kind of tree were found. Habitat: The largest of the Bonin Islands, south of Japan. {11} GEOSPIZA MAGNIROSTRIS GOULD. (PLATE 3, FIG. 1.) _Geospiza magnirostris_ Gould, Proc. Zool. Soc. London 1837, p. 5 (Galapagos Islands); Rothschild & Hartert, Nov. Zool. 1899 p. 154, 1902 p. 388; Sharpe, Cat. B. Brit. Mus. XII, pp. 6, 7 (Fig.); Ridgway, B. North and Middle America I, p. 495 (1901). As explained in Nov. Zool. 1899, p. 154, it is uncertain where Darwin obtained the type specimens of Gould's _G. magnirostris_, as "Unfortunately, most of the specimens of the finch-tribe were mingled together," as Darwin tells us in his "Journal of Researches" (New Edition 1890, p. 420), and he had only "strong reasons to suspect that some of the species of the sub-group _Geospiza_ are confined to separate islands." We are, however, convinced that the types of _G. magnirostris_ can only have come from Charles Island, where it is, probably, the representative of _G. strenua strenua_. It seems, however, that _G. magnirostris_ exists no longer, for all subsequent collectors have failed to obtain specimens, unless an immature specimen in the U. S. Nat. Mus., from Charles Island (No. 115,905), is a young _magnirostris_ (cf. Nov. Zool. 1902, p. 388). The dimensions of the three black specimens in the British Museum are as follows: Culmen 26.5, 27, 27; height of bill at base 23.5-24; wing 91, 91, 95; tarsus 25 mm. These measurements--a culmen of over 26.5 and a wing of 91 mm. combined--do not occur among our large series of _strenua_, and therefore it is hardly possible that _G. magnirostris_ is composed of huge examples of _strenua_ only.