"Adult male.--Head and upper neck chestnut; a glossy green patch on each side of the head from the eyes backward to upper nape; a narrow buffy line from the gape upward along the base of the upper mandible and from thence to the eye, bordering above and below the anterior part of the green patch; chin black; hind neck, back, and scapulars with narrow gray and black wavy lines; outer scapulars buff, broadly edged with black on the outer web; upper tail-coverts black, edged with buffish brown; on the middle of the neck a collar of whitish and black cross-lines; breast and abdomen white, the former with round subapical black spots; sides and flanks waved with narrow black lines; central under tail-coverts velvet-black, the lateral ones of a buff-color, with a band of black at the base; upper wing-coverts lead-gray, the greater row whitish buff, darker toward the inner ones; wing-speculum on the secondaries velvety black, with a white apical band on the outer half, glossy green on the inner half; first tertial velvet-black on the outer web; primaries and tail-feathers grayish brown, the later with pale edges; under wing-coverts gray, edged with white, the central ones and the axillars wholly white. Bill nearly black; iris hazel; legs, toes, and membranes brownish gray. Length, 368; wing, 184; tail, 76; culmen, 40; tarsus, 28. "Female.--General color of the upper parts dark brown, each feather with reddish brown edges; upper part of the head darker than the sides, which are whitish, thickly speckled with black; a black line behind the eyes; chin and throat whitish; the feathers of the back and scapulars with two, narrow, transverse, bars of buffy brown; under parts whitish, with a reddish tinge on the breast, each feather, except those of the belly, with obscure dark centers; wing as in the male but somewhat duller. "Young in first plumage closely resembles the female, but the wing-coverts have pale edgings, and the dark centers of the feathers appear also on the belly. "Males in molting plumage resemble the adult females. "'Nestling yellowish white on under parts, buff on forehead and throat; a dark brown streak from the forehead to crown, which with the upper parts is brown; a dark loral streak, and two other streaks from behind eye to nape on each side.' (Yarrell.)" (Salvadori.) Genus DAFILA Stephens, 1824. This well-marked genus may be recognized by its elongate form, long neck, and long pointed middle tail-feathers. 161. DAFILA ACUTA (Linnæus). PIN-TAIL DUCK. Anas acuta Linnæus, Syst. Nat. ed. 10 (1758), 1, 126. Dafila acuta Salvadori, Cat. Birds Brit. Mus. (1895), 27, 270; Blanford, Fauna Brit. Ind. Bds. (1898), 4, 447, fig. 116 (head); Sharpe, Hand-List (1899), 1, 219; Oates, Cat. Birds' Eggs (1902), 2, 172; McGregor and Worcester, Hand-List (1906), 38.