_Sterna longipennis_ Nordmann, in Erman's Verz. Thier. Pflanz.,
1835, p. 17. (Type locality, Mouth of the Kutchui River, Sea of
Okhotsk.)
_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