Bill dark greyish-blue. Iris bright red. Feet livid blue, claws dusky. The general colour of the plumage is pure white; a short band on each side of the hind neck bordering the crest, duck-green; a broad patch on the lore and below the eye, a narrow band across the lower part of the hind neck, formed by single bars near the tips of the feathers, the middle of the back in its whole length, a short transverse bar under the fore edge of the wing, the anterior margin of that organ to beyond the carpal joint, the outer edges of the scapulars, the primary coverts, the secondary coverts, and the outer secondary quills, excepting the tips of both, deep black. The quills are also black, but of a less deep tint; the hind part of the back becomes tinged with grey, and the rump and tail-feathers are dusky grey. The sides of the body and rump are white, finely undulated with blackish-grey. Length to end of tail 17-1/2 inches, to end of claws 18-1/4, to end of wings 15-1/2; extent of wings 27; bill along the ridge 1-(3-1/2)/12, along the edge of lower mandible 1-(7-1/2)/12; wing from flexure 7-3/4; tail 3-1/2; tarsus 1-(1-1/2)/12; first toe 1/2, its claw 2/12; second toe 1-1/2, its claw 4/12, third toe 1-11/12, its claw (4-1/2)/12; fourth toe 1-10/12, its claw 5/12. Weight 1 lb. 8 oz. Adult Female. Plate CCCXLVII. Fig. 2. The Female is much smaller. The feathers of the hind part of the head and neck are also elongated so as to form a crest. The bill, iris, and feet, are coloured as in the male. All the lower parts are white, excepting a broad band of light grey across the middle of the neck, and a narrow portion of the sides, which are of a deeper tint. There is a patch of brownish-black on the lore and beneath the eye; the upper part of the head and half of the hind neck, are light reddish-brown; the rest of the hind neck, and all the upper parts, bluish-grey, darker behind, and in the middle of the back approaching to black. The wings as in the male, that is black, with a large patch of white, and two narrow transverse bands of the same; the tail dusky grey. Length to end of tail 15-1/4 inches, to end of claws 16-1/2, to end of wings 14-1/2; extent of wings 25. Weight 1 lb. 4 oz. GADWALL DUCK. _ANAS STREPERA_, LINN. PLATE CCCXLVIII. MALE AND FEMALE. I have met with this species along the whole of our Atlantic coast, from Eastport in Maine to Texas. It is, however, more abundant in the interior than in most of our maritime districts, and is particularly so on the tributaries of the Ohio, Missouri, and Mississippi. In the early part of autumn and late in spring many are found on the margins of our great lakes. Yet the Gadwall has been represented as not plentiful in the United States, probably on account of its being generally dispersed, and not congregated in particular districts.