Zeocephus cyanescens Sharpe,
Trans. Linn. Soc. 2d. ser. Zool. (1877), 1, 328; Cat. Birds
Brit. Mus. (1879), 4, 343; Hand-List (1901), 3, 262; Whitehead,
Ibis (1893), 49; McGregor and Worcester, Hand-List (1906), 74.
Calamianes (Bourns & Worcester); Palawan (Steere, Lempriere,
Platen, Whitehead, Steere Exp., Bourns & Worcester, Celestino,
White).
Male.--General color grayish cobalt or smalt-blue; chin, lores,
a small spot at base of lower mandible, and a narrow frontal line
velvety black; primaries and secondaries black, edged with blue;
rectrices black below and their shafts black. "Eye black; bill and legs
cobalt-blue; inside of mouth bright green." (Whitehead.) Length, about
215; wing, 93; tail, 100; culmen from base, 23; bill from nostril,
15; tarsus, 17.
Female.--Similar to the male, but abdomen and crissum whitish. Wing,
93; tail, 95; culmen from base, 22; bill from nostril, 14; tarsus, 16.
Young.--Similar to the adult, but lores and forehead blue; back buffy
brown; remiges and rectrices largely buffy brown; under tail-coverts
white washed with buff.
"Quite common both in Palawan and the Calamianes. A forest form. Four
males average: Length, 220; wing, 96; tail, 100; culmen, 25; tarsus,
16; middle toe with claw, 18. Five females, length, 200; wing, 89;
tail, 89; culmen, 23; tarsus, 16; middle toe with claw, 17. Iris
black; legs and feet blue; nails black; bill blue, deepest at base,
tip sometimes black; eye-wattles blue." (Bourns and Worcester MS.)
Genus CALLAEOPS Grant, 1895.
"A new genus of Muscicapidæ most nearly allied to Arses, which it
resembles in having a disk-like wattle formed by the prolongation
of the eyelid, which entirely surrounds the rather large eye. As in
Terpsiphone, there is a large, full, occipital crest, and the tarsi and
toes are short and slender; but the tail is like that of Rhipidura,
wedge-shaped and composed of twelve feathers, the outer pair being
two-thirds of the length of the middle pair. The first flight-feather
is half the length of the second, which is about equal to the tenth;
the fourth being slightly the longest." (Grant.)