"Adult male.--Above slaty gray, the upper tail-coverts blackish and tipped with white; head and neck clearer slaty gray, including a conspicuous occipital crest, the sides of the neck somewhat tinged with rufous; quills browner than the back, primaries with rufescent shafts, barred above with dark brown, much plainer underneath, where the quills are white at the base of the inner web; tail ashy brown, paler at tip, crossed with four bands of dark brown; throat white, with a distinct black moustachial streak on each side and a broad median line; chest clear tawny-rufous; rest of under surface white, broadly banded with pale rufous, each bar of this color having a conterminous brown bar, the thighs thickly barred with ashy brown without any rufous tinge; under tail-coverts white; under wing-coverts white, spotted with brown or rufous-brown, and the axillars similarly barred. Cere orange-yellow; bill black, lead-color at base; cheeks and orbits orange; feet yellow; iris orange-yellow. Length, 356; culmen, 27; wing, 198; tail, 160; tarsus, 56. "Adult female.--Similar to the adult male, but much larger. Length, 457; wing, 246; tarsus, 68. "Young.--Above brown, with a fully developed occipital crest, upper tail-coverts banded with darker brown and tipped with white; quills and tail much as in the adult, the latter with five cross-bands of darker brown; under surface of body white, the throat with the three characteristic streaks like the adult, the breast broadly streaked with pale rufous, inclining to dark brown in the center of the chest, the lower breast and abdomen barred with pale rufous, the bars narrower and darker on the thighs; under tail-coverts white, with a few narrow, nearly obsolete, cross-bars; under wing-coverts buff, spotted and barred with dark brown." (Sharpe.) 177. ASTUR SOLOENSIS (Latham). HORSFIELD'S GOSHAWK. Falco soloensis Latham, Gen. Hist. (1821), 1, 209. Astur soloensis Sharpe, Cat. Birds Brit. Mus. (1874), 1, 114, pl. 4, fig. 1; Hand-List (1899), 1, 250; Oates, Cat. Birds' Eggs (1902), 2, 245; McGregor and Worcester, Hand-List (1906), 41. Basilan (McGregor); Cagayancillo (McGregor); Luzon (Whitehead); Mindanao (Steere Exp., Bourns & Worcester, Goodfellow). China and Indo-Chinese countries; in winter to Malay Peninsula, Indo-Malayan Islands, and Moluccas.