_Micranous marcusi_ Bryan, Occ. Papers Bernice P. Bishop Mus., 2, 1903, p. 101. (Type locality, Marcus Island.) _Sterna tenuirostris_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 286, 308 (Ualan, Ouleai); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 64 (Ualan). _Anous tenuirostris_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 113 (Pelew, Carolines); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 42 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 330 (Mortlock, Nukuor); Stott, Auk, 64, 1947, p. 526 (Saipan). _Anous melanogenys_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Palau); _idem_, Journ. f. Ornith., 1880, pp. 295, 308 (Ponapé, Kuschai); _idem_, Ibis, 1880, pp. 219, 220, 332 (Taluit, Arno); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 107, 109, 115 (Kuschai, Ponape); Salvadori, Ornith. Papuasia, 3, 1882, p. 456 (Pelew, Ponapé, Marshalls); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Jaluit, Arno, Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1901 (1891), p. 77 (Pelew, Ualan, Ponapé, Nukuor, Luganor, Ruk); Hartert, Katalog Vogelsamml. Senckenb., 1891, p. 238 (Ualan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 50 (Pelew, Ruk, Wolea, Luganor, Nukuor, Ponapé, Kusaie, Marshalls). _Anous leucocapillus_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); Nehrkorn, Journ. f. Ornith., 1879, p. 410 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Jaluit); Tristram, Cat. Coll. Birds, 1889, p. 10 (Pelew); Salvadori, Ornith. Papuasia, 3, 1882, p. 457 (Pelew); Wiglesworth, Abhandl. und Ber Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 77 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 60 (Saypan, Palaos, Ruk, Luganor, Nukuor, Ponapé, Kuschai, Bonham); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 20 (Saipan?); Safford, Osprey, 1902, p. 66 (Marianas); _idem_, The Plant World, 7, 1904, p. 267 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam). _Micranous leucocapillus_ Saunders, Cat. Birds British Mus., 25, 1896, p. 145 (Pelew, Caroline Islands); Nehrkorn, Kat. Eiers., 1899, p. 222 (Kusai); Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Pelew).