"A common and widely spread species. P. discurus, as well as the other five Philippine representatives of the genus, is usually met with in the forest or in fruit trees in the open, where it has gone to feed. At certain seasons it frequents the mangrove swamps. All the Philippine species are birds of very rapid flight, and scream almost constantly when on the wing. They usually fly in small flocks. In the forest they make the most of their protective coloring, and one may pass within ten feet of one without seeing it. "Measurements are given exclusive of rackets. Four males from Basilan measure, 232 in length; wing, 149; tail, 66; culmen, 21; tarsus, 14; middle toe with claw, 28. "Sibuyan birds are slightly larger, and have a light yellowish green area on back, but we do not feel warranted in separating them. Three females from Sibuyan measure, 257 in length; wing, 161; tail, 134; culmen, 22; tarsus, 16; middle toe with claw, 29. Iris brown; legs and feet leaden; nails blackish; bill grayish white." (Bourns and Worcester MS.) 238. PRIONITURUS WATERSTRADTI Rothschild. WATERSTRADT'S RACKET-TAILED PARRAKEET. Prioniturus waterstradti Rothschild, Bull. Brit. Orn. Club (1904), 14, 72; Hartert, Novit. Zool. (1906), 13, 756; Grant, Ibis (1906), 495; McGregor and Worcester, Hand-List (1906), 49. Mindanao (Waterstradt, Goodfellow). Male.--"Forehead to the eyes pale blue, the feathers being green at base; lores and sides of face greenish blue; sinciput and nape grass-green; scapulars and back green with a slight brownish tinge; rump light greenish brown; wings outwardly bright green, inner webs of remiges, blackish from above, pale bluish from below; upper wing-coverts grass-green, slightly tinged with blue near bend of wing; rectrices, bright green from above, bluish from below, tipped with dull black for about 12 to 14 mm., the central pair quite green except the shaft and spatules, which are dull black; entire under side uniform yellowish green. Bill (in skin) whitish with leaden-gray base; feet dark gray. Wing, 152 to 157; tail, about 66, with lengthened central pair, 120 to 140; culmen from cere, 22; metatarsus, 15. One specimen marked '[female]' is similar to the male." (Rothschild.) This species is known from specimens collected by Waterstradt on Mount Apo at 900 meters elevation, and by Goodfellow at 2,500 meters. 239. PRIONITURUS MINDORENSIS Steere. MINDORO RACKET-TAILED PARRAKEET. Prioniturus mindorensis Steere, List Birds and Mams. Steere Exped. (1890), 6; Salvadori, Cat. Birds Brit. Mus. (1891), 20, 419; Sharpe, Hand-List (1900), 2, 29; McGregor and Worcester, Hand-List (1906), 49. Mindoro (Steere Exp., Schmacker, Everett, Bourns & Worcester, Whitehead, McGregor, Porter).