_Collocalia fuciphaga rukensis_ Kuroda, Tori, 1, 1915, pp. 58, 59,
pl. 3, fig. 1. (Type locality, Ruk.)
_Collocalia vanicorensis_ Finsch (part), Proc. Zool. London, 1880,
p. 575 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy,
1881, p. 353 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus.
Dresden, no. 6, 1890-1891 (1891), p. 18 (Uap and Ruk); Hartert,
Novit. Zool., 7, 1900, p. 11 (Ruk); Matschie, Journ. f. Ornith.,
1901, p. 112 (Yap, Ruk).
_Collocalia fuciphaga vanikorensis_ Oberholser (part), Proc. U. S.
Nat. Mus., 42, 1912, p. 20 (Uala = Truk).
_Collocalia fuciphaga rukensis_ Takatsukasa and Kuroda, Tori, 1,
1915, p. 53 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p.
62 (Ruk, Yap); Kuroda, Ibis, 1927, p. 706 (Truk); Mathews, Syst.
Avium Australasianarum, 1, 1927, p. 402 (Ruk); Hand-list Japanese
Birds, rev., 1932, p. 178 (Ruk).
_Collocalia fuciphaga inquieta_ Kuroda, in Momiyama, Birds
Micronesia, 1922, p. 62 (Ruk).
_Collocalia inquieta rukensis_ Mayr, Amer. Mus. Novit., no. 915,
1937, p. 11 (Ruk); Peters, Check-list Birds World, 4, 1940, p. 225
(Truk, Yap); Mayr, Birds Southwest Pacific, 1945, p. 292 (Yap,
Truk).
_Collocalia vanikorensis rukensis_ Hand-list Japanese Birds, 3d
ed., 1942, p. 198 (Truk, Yap).
_Geographic range._--Micronesia: Caroline Islands--Truk, Yap.
_Characters._--Adult: Resembles _C. i. inquieta_ but with wing
shorter.
_Measurements._--Measurements are given in table 31.
_Specimen examined._--One unsexed bird from Caroline Islands,
USNM--Truk (Feb. 16).
_Remarks._--Little is known concerning this swiftlet. The bird at Yap is
referred to this race; I have not seen specimens from this island.
McElroy reports seeing no swiftlets at Truk in December, 1945. _C. i.
rukensis_ appears to be intermediate in size between _C. i. inquieta_
and _C. i. ponapensis_. Richards writes (_in litt._) that he found
swiftlets common at Truk in 1948. He also noted a large swiftlike bird
in "January or February," 1948, near the summit of Mount Tonáchian on
Moen Island. From his description, the bird may have been a large
migratory swift, possibly _Apus pacificus_ or _Chaetura caudacuta_,
neither of which have been reported previously from Micronesia.
=Collocalia inquieta ponapensis= Mayr