Ixobrychus eurythmus Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau).
Geographic range.—Southeastern Siberia and Japan south to India and Malaysia. In Micronesia: Palau Islands—exact locality unknown.
Specimens examined.—Total number, 3 (2 males, 1 female), from Palau Islands, AMNH—exact locality not given (Nov. 19, 21, Dec. 3).
Remarks.—Coultas obtained three immature specimens at Palau in November and December, 1931.
Dupetor flavicollis flavicollis (Latham)
Black Bittern
Ardea flavicollis Latham, Ind. Ornith., 2, 1790, p. 701. (Type locality, India.)
Dupetor flavicollis Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 26 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam).
Dupetor f. flavicollis Mayr, Birds Southwest Pacific, 1945, p. 302 (Guam).