Estrelda trichroa Gray, Genera Birds, 2, 1849, p. 369 (Kusaie?); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 27 (Oualan).
Erythrura trichroa Bonaparte, Consp. Avium, 1, 1850, p. 457 (Ualan); Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 133 (Carolinen = Kusaie); idem, Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie); Gray, Hand-list Birds, 2, 1870, p. 58 (Ualan); Giebel, Thes. Ornith., 2, 1875, p. 118 (Carolinen = Ualan); Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 36 (Ualan); idem (part), Journ. f. Ornith., 1880, pp. 290, 297, 302 (Kusaie); idem (part), Ibis, 1881, pp. 104, 108 (Kuschai); Salvadori (part), Ornith. Papuasia, 2, 1881, p. 442 (Carolinis = Kusaie?); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Kusaie); Sclater (part), Ibis, 1881, p. 545 (Ualan); Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 385 (Carolines = Kusaie); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 42 (Ualan); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ualan); Dubois (part), Syn. Avium, 1, 1902, pp. 583 (Carolines = Kusaie); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Kusaie).
Erythrura kittlitzi Bonaparte, Consp. Avium, 1, 1850, p. 457 (ex Bonaparte MSS.) (Type locality, Ualan); Gray, Hand-list Birds, 2, 1870, p. 58 (Caroline Islands = Kusaie).
Erythrura trichros trichros Hartert (part), Novit. Zool., 7, 1900, p. 6 (Kusaie); Kuroda (part), in Momiyama, Birds Micronesia, 1922, pp. 27, 29, 78 (Kusaie); Mayr (part), Amer. Mus. Novit., no. 489, 1931, p. 4 (Kusaie); Takatsukasa and Yamashina, Tori, 7, 1931, p. 110 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 170 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 189 (Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 302 (Kusaie).
Chloromunia trichroa trichroa Mathews (part), Syst. Avium Australasianarum, 2, 1930, p. 840 (Ualan).
Geographic range.—Micronesia: Caroline Islands—Kusaie.
Characters.—Adult: A small finch with thick, stout bill; head, neck, back, and scapulars between "parrot green" and "grass green"; forehead, orbital area, auriculars, and malar area bluish; sides of neck green tinged with yellowish; edge of forehead and lores blackish; wing-coverts and outer margins of wings yellowish-green; underparts like back but paler green; rump, upper tail-coverts and outer edges of tail feathers near "Pompeian red"; wing and tail feathers mostly brownish; bend of wing greenish; under wing-coverts brownish; axillaries buffy tinged with greenish; bill black; feet light yellowish-brown; iris brown. Adult female duller than male.
Immature: Resembles adult, but lacks bluish coloring on sides of head and on forehead; underparts washed with buffy brown; rump and tail duller carmine.
Measurements.—Measurements are listed in [table 53].
Specimens examined.—Total number, 14 (12 males, 2 females), from Caroline Islands, AMNH—Kusaie (Feb., March, April).