_Muscicapa Rugensis_ Hombron and Jacquinot, Ann. Sci. Nat. Paris,
(2), 16, 1841, p. 312. (Type locality, Roug = Truk.)
_Monarcha rugensis_ Hartlaub, Archiv. f. Naturgesch., 18, 1852, p.
133 (Gruppe Roug. = Truk); _idem_, Journ. f. Ornith., 1854, p. 168
(Carolinen = Truk); _idem_, Proc. Zool. Soc. London, 1867 (1868),
p. 829 (Hogoleu = Truk); Gray, Hand-list Birds, 1, 1869, p. 321
(Caroline = Truk); Giebel, Thes. Ornith., 2, 1875, p. 614
(Carolinae = Truk); Schmeltz and Krause, Ethnogr. Abth. Mus.
Godeffroy, 1881, p. 353 (Ruk).
_Colluricincla rugensis_ Pucheran, Voy. Pôle Sud, Zool., 3, 1853,
p. 62 (Ruk); Hartlaub, Journ. f. Ornith., 1854, p. 162 (Roug =
Truk).
_Metabolus rugensis_ Bonaparte, Comptes Rendus Acad. Sci. Paris,
38, 1854, p. 650 (no locality = Truk); Sharpe, Cat. Birds British
Mus., 4, 1879, p. 238 (Ruk); Finsch, Proc. Zool. Soc. London, 1880,
p. 575 (Ruk); Tristram, Cat. Birds, 1889, p. 197 (Ruk);
Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891
(1891), p. 19 (Ruk); Nehrkorn, Kat. Eiers., 1899, p. 26 (Ruk);
Hartert, Novit. Zool., 7, 1900, p. 4 (Ruk); Matschie, Journ. f.
Ornith., 1901, p. 112 (Ruk); Reichenow, Die Vögel, 2, 1914, p. 262
(Karolinen = Truk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54
(Ruk); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zool.,
63, 1919, p. 203 (Truk); Kuroda, in Momiyama, Birds Micronesia,
1922, p. 63 (Ruk); Mathews, Syst. Avium Australasianarum, 2, 1930,
p. 470 (Ruk); Yamashina, Tori, 7, 1932, p. 404 (Truk); Hand-list
Japanese Birds, rev., 1932, p. 178 (Truk); Hand-list Japanese
Birds, 3d ed., 1942, p. 197 (Truk); Mayr, Birds Southwest Pacific,
1945, p. 295 (Truk).
_Monarcha (Metabolus) rugensis_ Gray, Cat. Birds Trop. Is. Pacific
Ocean, 1859, p. 19 (Caroline Islands).
_Geographic range._--Micronesia: Caroline Islands--Truk.
_Characters._--Adult male: White feathers (with dark bases)
throughout except for black ones on forehead, lores, chin, and
throat; chin and throat with steel-blue gloss; tips of second to
fifth or seventh primaries black, black coloring extending along
inner webs; shafts of primaries and basal half of tail feathers
black; bill and feet black.
Adult female: Resembles adult male, but generally sooty-black,
darker above; under tail-coverts and sometimes rump splotched with
white; white coloring may also be present on tips of secondaries,
on chin, and on tail.
Immature: Resembles adult, but bright cinnamon on upper parts and
on wings and tail; inner webs of primaries grayish or dark brown,
shafts of primaries lighter on basal half; lores, chin and throat
white or washed with creamy-buff; breast and abdomen whitish,
washed with cinnamon, sides darker rufous, under wing-coverts,
axillaries, and under tail-coverts usually light rufous although
somewhat variable in color; basal part of bill yellow, tip of bill
horn colored. Immatures may be observed in all stages of color
change toward the adult condition.
_Measurements._--Measurements are listed in table 40.