Artamus melanoleucus pelewensis Kuroda, in Momiyama, Birds Micronesia, 1922, p. 69 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 635 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 174 (Palau).
Geographic range.—Micronesia: Palau Islands—Babelthuap, Angaur.
Characters.—Adult: Upper surface black, except for back which is slightly brownish and for rump which is white; underparts white, except for chin, throat and upper breast which are black; wings with grayish tips; bend of wing black; bill milky blue, nostril and tip black; feet black; iris dark brown.
Immature: Resembles adult, but black feathers with brownish tinges; primaries tipped with white.
Measurements.—Measurements are listed in [table 44].
Table 44. Measurements of Artamus leucorhynchus pelewensis Finsch
Table 44. Measurements of Artamus leucorhynchus pelewensis Finsch
| Number and Sex | Wing | Tail | Culmen | Tarsus |
| 5 males | 134 | 68 | 25 | 16.5 |
| (132-136)) | (66-69) | (24-26) | ||
| 4 females | 134 | 68 | 24 | 16.5 |
| (132-136) | (67-69) | (16.5-17.0) |
Specimens examined.—Total number, 12 (7 males, 5 females), from Palau Islands, AMNH—exact locality not given (March, Nov., Dec.).