1900. A. MERTENS. Die Moas im Naturwissenschaftl. Museum zu Magdeburg. Mit 2 Abbildungen. In: Jahresbericht Naturwiss. Vereins zu Magdeburg für 1898-1900. (Pp. 1-24 in separate copy.) 1901. W. A. BRYAN. Key to the Birds of the Hawaiian group. 1902. WALTER ROTHSCHILD AND ERNST HARTERT. Further notes on the fauna of the Galápagos Islands. In Nov. Zool. 1902, pp. 381-418; cf. also Nov. Zool. 1899, pp. 154, 163. (_Geospiza magnirostris_ and _dentirostris_.) 1902. H. W. HENSHAW. Birds of the Hawaiian Islands, being a complete list of the Birds of the Hawaiian Possessions, with notes on their habits. Honolulu 1902. 1903. GRAHAM RENSHAW. The Black Emu. In: Zoologist 1903, pp. 81-88. 1903. WILHELM BLASIUS. Der Riesenalk, _Alca impennis_ L. In the New Edition of Naumann called "Naumann, Naturgeschichte der Vögel Mitteleuropas" (sic), vol. XII, pp. 169-208, pls. 17, 17A-17D, 1903. (Among others the most complete bibliography and very detailed descriptions.) 1903. FLEMING, J. H. On the Passenger Pigeon. In Auk 1903, p. 66. {xxvi} 1903. M. GUILLAUME GRANDIDIER. Contribution à l'étude de l'Epiornis de Madagascar. In: Comptes Rendus des Séances de l'Acad. Sc., Paris 1903 (pp. 1-3 in separate copy.) 1903. G. GRANDIDIER. Note au sujet du squelette de l'_Aepyornis ingens_. In Bull. Mus. Paris 1903, pp. 318-323, with figures. 1903. PAUL CARIÉ. Observations sur quelques oiseaux de l'ile Maurice. In Ornis XII, p. 121-128. (We are informed that neither _Palaeornis echo_--sub nomine _eques_--nor _Nesoenas mayeri_ are extinct.) 1905. A. H. CLARK. Extirpated West Indian Birds. In Auk 1905, pp. 259-266. 1905. A. H. CLARK. The Lesser Antillean Macaws. In Auk 1905, pp. 266-273. 1905. A. H. CLARK. The West Indian Parrots. In Auk 1905, pp. 337-344. 1905. A. H. CLARK. The Greater Antillean Macaws. In Auk 1905, pp. 345-348. 1905-1906. SIR WALTER BULLER. Supplement to the "Birds of New Zealand." Two volumes. (Though containing very interesting notes on extinct and threatened birds, these two volumes are rather disappointing. They contain very little that is new, and are mainly composed of quotations from other people's writings or letters. Buller's former great book on the Birds of New Zealand was a most important and creditable work, though not without shortcomings. Our knowledge of New Zealand Birds might have been brought up to date in his supplement, but we cannot say that this has been done properly, and errors are frequent.) 1906. BALDWIN SPENCER. The King Island Emu. In The Victorian Naturalist XXIII (1906), pp. 139, 140. (_Dromaius minor_ described.)