_Hirundo gutturalis_ Scopoli, Del. Flor. et Faune, Insubr., 2,
1786, p. 96. (Type locality, "in Nova Guinea," error = Panay,
Philippine Islands.)
_Hirundo rustica_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 112
(Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881,
p. 391 (Yap).
_Hirundo rustica gutturalis_ Hand-list Japanese Birds, rev., 1932,
p. 178 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 198
(Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau);
Baker, Smithson. Mus. Coll., vol. 107, no. 15, 1948, p. 65 (Guam,
Angaur, Ngesebus).
_Geographic range._--Breeds in northeastern Asia, winters south to
Australia and Pacific islands. In Micronesia: Mariana
Islands--Guam, Tinian; Palau Islands--Babelthuap, Koror, Ngesebus,
Peleliu, Angaur; Caroline Islands--Yap.
_Specimens examined._--Total number, 13 (9 males, 3 females, 1
unsexed), as follows: Mariana Islands, USNM--Tinian, 10 (Oct. 23,
25); Palau Islands, USNM--Babelthuap, 1 (Nov. 27)--Angaur, 1 (Sept.
21); AMNH--exact locality not given, 1 (Oct. 26).
_Remarks._--This swallow is a winter migrant to western Micronesia from
Asia. In the Palau Islands in September, 1945, the NAMRU2 party saw the
swallow at Ngesebus and Angaur in small flocks. At Guam, the NAMRU2
party saw one bird on October 7 and four birds flying near Agaña River
on October 11. Strophlet (1946:535) saw one bird on October 28, 1945,
and six birds on November 16 at Guam. Marshall (1949:221) found swallows
at Tinian, Saipan and Palau from October to February. He found only
immature birds.
=Edolisoma tenuirostre monachum= (Hartlaub and Finsch)