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the results of which were published in the "Proceedings" of the Museum, vol. xii, pp. 101-139; an extensive collection of Costa Rican birds submitted for the purpose by the Director of the Costa Rica National Museum, (Proceedings, xi, pp. 537-546); a careful revision of the very difficult Dendrocolaptine genera ([[underlined]] Xiphocolaptes [[/underlined]] and [[underlined]] Sclerurus [[/underlined]] ("Proceedings," xii, pp. 1-31). Dr. Stejneger has continued his important investigations on birds of Japan and the Hawaiian Islands, and has also contributed a valuable paper on the extinct Pallas' Cormorant of Bering Island. Other persons, both in the United States and in Europe, have used extensively material belonging to the Department in