_Collocalia vanikorensis ponapensis_ Mayr, Amer. Mus. Novit., no.
820, 1935, p. 3. (Type locality, Ponapé.)
_Collocalia vanicorensis_ Finsch (part), Journ. Mus. Godeffroy,
12, 1876, pp. 17, 23 (Ponapé); _idem_, Proc. Zool. Soc. London,
1877 (1878), p. 778 (Ponapé); _idem_ (part), Journ. f. Ornith.,
1880, p. 285 (Ponapé); _idem_, Ibis, 1881, p. 115 (Ponapé);
Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6,
1890-1891 (1891), p. 18 (Ponapé); Matschie (part), Journ. f.
Ornith., 1901, p. 112 (Ponapé).
_Collocalia fuciphaga_ Hartert, Cat. Birds British Mus., 16, 1892,
p. 498 (Ponapé).
_Collocalia fuciphaga vanikorensis_ Takatsukasa and Kuroda, Tori,
1, 1915, p. 53 (Ponapé).
_Collocalia fuciphaga inquieta_ Kuroda (part), in Momiyama, Birds
Micronesia, 1922, p. 62 (Ponapé).
_Collocalia vanikorensis ponapensis_ Mayr, Amer. Mus. Novit., no.
828, 1936, p. 12 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942,
p. 198 (Ponapé).
_Collocalia inquieta ponapensis_ Mayr, Amer. Novit., no. 915,
1937, p. 11 (Ponapé); Peters, Check-list Birds World, 4, 1940, p.
225 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 292
(Ponapé).
_Collocalia inquieta_ Mayr, Proc. 6th Pac. Sci. Congr., 4, 1941,
p. 204 (Ponapé).
_Geographic range._--Micronesia: Caroline Islands--Ponapé.
_Characters._--Adult: According to Mayr (1936:12), "Very similar
to _inquieta_, but much smaller; on the upper parts apparently
somewhat less glossy, and not so dark, more brownish; under parts
very variable, sometimes very dark (partly on account of
greasing), sometimes quite silvery on the throat; very dark
specimens show some greenish gloss not only on the longest under
tail-coverts, but also on the entire under side, except on the
throat; rump of the same color as the back; tarsus unfeathered."
_Measurements._--Measurements are listed in table 31.
_Specimens examined._--Total number, 37 (19 males, 18 females) from
Caroline Islands, AMNH--Ponapé (Nov., Dec.).
_Nesting._--Coultas obtained young birds from nests in caves in
November and December.
_Remarks._--I am following Mayr (1937:11) and Peters (1940:225) in this
treatment of these Caroline swiftlets, even though the differences
between _C. inquieta_ and _C. vanikorensis_ appear to be slight indeed.
_C. inquieta_ appears closest to the forms of _C. vanikorensis_ in
Northern Melanesia. The birds found in New Guinea and the Solomons are
similar in size to the birds in the Carolines, while those in the
Moluccas, Admiralties and Lihir are larger. Color differences are slight
with the pale color of the sides of the head and underparts being
variable. All of these dark-rumped birds evidently evolved in the
Melanesian area.
=Halcyon cinnamomina cinnamomina= Swainson