Pericrocotus marchesæ Guillemard, Proc. Zool. Soc. (1885), 259,
pl. 18, fig. 1; Sharpe, Hand-List (1901), 3, 300; McGregor and
Worcester, Hand-List (1906), 77.
Sulu (Guillemard, Platen, Bourns & Worcester).
Adult male.--Entire head, chin, throat, and anterior half of back
glossy blue-black; lower back, rump, tail-coverts, and all of the
under parts, except chin and throat, bright egg-yellow; wings glossy
black; a diagonal yellow band begins on middle of fifth primary and
extends on to the secondaries where it becomes wider; inner greater
secondary-coverts widely tipped with yellow; four or five secondaries
each with a yellow spot near tip; rectrices black, all but the central
pair with wide yellow tips. Wing, 77; tail, 80; culmen from base,
14; bill from nostril, 10; tarsus, 15.
"This fine bird was several times found in flocks in Sulu, both in the
forest and in the open. Iris, bill, legs, feet, and nails black. Six
males average, 170 in length; wing, 77; tail, 84; culmen, 17; tarsus,
14; middle toe with claw, 15. Four females, length, 171; wing, 77;
tail, 84; culmen, 16; tarsus, 14; middle toe with claw, 14." (Bourns
and Worcester MS.)