_Oestrelata hypoleuca_ Salvin, Ibis, 1888, p. 359. (Type locality,
Krusenstern Island = Ailuk, Marshall Islands, _fide_ Fisher, Auk.,
63, 1946, pp. 587-588).
_Oestrelata hypoleuca_ Salvin, Cat. Birds British Mus., 25, 1896,
p. 409 (Krusenstern); Godman, Monogr. Petrels, pt. 3, 1908, p. 212
(Krusenstern).
_Cookilaria hypoleuca hypoleuca_ Mathews, Syst. Avium
Australasianarum, 1, 1927, p. 122, (Marshall Group).
_Pterodroma leucoptera hypoleuca_ Hand-list Japanese Birds, rev.,
1932, p. 188 (Marshalls); Hand-list Japanese Birds, 3d ed., 1942,
p. 210 (Krusenstern); Fisher, Auk, 63, 1946, pp. 387-388 (Ailuk).
_Pterodroma hypoleuca hypoleuca_ Mayr, Birds Southwest Pacific,
1945, p. 11 (Micronesia).
_Geographic range._--Ranges from the Bonins east to the Hawaiians
and south to Micronesia. In Micronesia: Marshall Islands--Ailuk.
_Characters._--Upper parts grayish except for forehead whitish,
crown and nape sooty-black; underparts whitish except for sides of
breast sooty-black; legs and feet flesh color except for tips of
toes and webs which are black.
_Remarks._--In Micronesia, this petrel is known only from the type
locality, Krusenstern or Ailuk, Marshall Islands. Fisher (1946: 587-588)
has corrected the confusion regarding the exact position of this type
locality.
=Phaëthon aethereus mesonauta= Peters