"Adult.--The adult plumage appears to be gained by a gradual mersion of the rufous stripes on the breast. Above light bluish gray, some of the feathers margined with darker gray; sides of face and neck gray like the head, but a little more dingy; under surface of the body pale buffy vinous, the throat, flanks, and thighs, as well as the under wing- and tail-coverts, white, with a slight grayish shade on the sides of the breast; quills black externally, shaded with ashy gray, under surface white at base of inner web, but having no distinct bars above or below; tail dull bluish gray above, ashy white beneath, with four or five indistinct cross-bands of dark brown, a little plainer underneath, but these not strictly continuous. Cere yellow; gape and orbits yellowish; bill black, lead-color at base; feet yellow; iris yellow. Length, 300; culmen, 19; wing, 200; tail, 137; tarsus, 48. "Observation.--A specimen from the Philippines, nearly adult in every respect, is much deeper slate-color above, and far more ruddy and vinous below, than the one described. "Young.--Above brown, with rufous edgings to the feathers, a little broader on the upper tail-coverts, the sides of the neck washed with rufous, the nape mottled with white; crown blackish, an ill-defined eyebrow and fore part of the cheeks white, narrowly lined with blackish brown; the ear-coverts brown, slightly washed with dull rufous; throat buffy white, with a moustachial line on each side and a median streak of brown; rest of under surface buffy white, the chest broadly streaked and the breast and flanks barred with pale rufous; under tail-coverts white; under wing-coverts clear buff, the lowest ones spotted with blackish; quills dark brown, slightly tipped with whitish, very indistinctly barred above with darker brown, underneath buffy white at the base of the inner web, indistinctly barred with dark brown, visible only on the inner webs; tail ashy brown, whitish at tip, crossed with five bars of darker brown, the under surface whitish ashy, the cross-bars more distinct, except on the outer web, where they are almost obsolete." (Sharpe.) "Met with only in Mindanao, where it is not at all common." (Bourns and Worcester MS.) Male specimen from Cagayancillo: Bill black, bluish at base; iris dark brown; cere and legs buffy yellow; nails black. Length, 285; wing, 190; tail, 131; culmen from base, 20; tarsus, 41. 178. ASTUR CUCULOIDES (Temminck). CUCKOO GOSHAWK. Falco cuculoides Temminck, Pl. Col. (1823), 1, pls. 110, 129. Astur cuculoides Sharpe, Cat. Birds Brit. Mus. (1874), 1, 115, pl. 4, fig. 2; Hand-List (1899), 1, 250; McGregor, Bull. Philippine Mus. (1904), 4, 15; McGregor and Worcester, Hand-List (1906), 41. Cagayancillo (McGregor). China; in winter to the Malay Archipelago.