_Sterna longipennis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 112 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 41 (Palau); Salvadori, Ornith. Papuasia, 3, 1882, p. 440 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 74 (Pelew); Saunders, Cat. Birds British Mus., 25, 1896, p. 67 (Pelew); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 21 (Pelew). _Sterna hirundo longipennis_ Hand-list Japanese Birds, rev., 1932, p. 195 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 218, (Palau); Mayr, Birds Southwest Pacific, 1945, p. 25 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Melanesia. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--Finsch (1875:41) states that Heinsohn and Kubary obtained specimens of this tern from the Palau Islands for the Godeffroy Museum. These are the only records for the occurrence of the Black-billed Common Tern in Micronesia. =Sterna sumatrana sumatrana= Raffles Black-naped Tern _Sterna Sumatrana_ Raffles, Trans. Linn. Soc. London, 13, pt. 2, 1822, p. 329. (Type locality, Sumatra.) _Sterna melanauchen_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 306, 308 (Guahan, Ouleai); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 113 (Pelew, Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 41 (Palau); _idem_, Ibis, 1880, pp. 220, 330, 332 (Taluit); _idem_, Journ. f. Ornith., 1880, p. 295 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 113, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 299, 330, 353 (Ponapé, Mortlock, Nukuor, Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 444 (Pelew, Mackenzie, Ruk, Ponapé, Marshalls); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 74 (Pelew, Uap, Ruk, Luganor, Nukuor, Ponapé, Taluit); Sanders, Cat. Birds British Mus., 25, 1896, p. 126 (Carolines, Pelews, Marshalls); Nehrkorn, Kat. Eiers., 1899, p. 222 (Palau); Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ruk, Ponapé); Uchida, Annot. Zool. Japon., 9, 1918, pp. 483, 488 (Ponapé). _Sterna sumatrana_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 186 (Arhno). _Gygisterna sumatrana_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 52 (Pelew, Mackenzie, Yap, Ruk, Luganor, Nukuor, Ponapé, Taluit, Arhno). _Gygisterna sumatrana sumatrana_ Kuroda, Avifauna Riu Kiu, 1925, p. 192 (Carolines, Pelews).