Male with an elongated longitudinal double crest, eighteen tail-feathers, bill and feet deep carmine; head and upper part of neck glossy greenish-black, with bright green reflections along the sides, and purplish on the crest; a broad collar of white, succeeded by another of light brownish-red, longitudinally streaked with dusky; lower parts white, except the sides of the body and rump, which are transversely undulated with greyish-black, and the larger wing-coverts, which are ash-grey; fore part of back, and inner scapulars deep black; feathers anterior to the wing white, with a broad margin of black; some of the anterior wing-coverts ash-grey, the rest, the outer scapulars, and the terminal half of the secondary coverts, pure white; basal portion of the latter, primary coverts, and primary quills, black, the latter tinged with brownish-grey; secondaries white, with the base and the outer margin of most black, which colour predominates on the inner; middle and hind part of back ash-grey, undulated with white and dusky; tail brownish-grey. Female with crest shorter, the bill and feet paler; head and fore part of neck light reddish-brown; throat and under part white, excepting the sides and larger wing-coverts, which are brownish-grey; hind neck, back, tail-coverts, tail, scapulars, and wing-coverts brownish-grey; wings greyish-black, with a large white patch, formed by the terminal portions of the secondary coverts, and the greater part of some of the outer secondaries. Young, when fledged, resemble the female. Young, in down, with the head and hind neck reddish-brown, the back greyish-brown, with three white spots on each side, the lower parts greyish-white; a white band from the bill to the eye, a reddish-brown band under the eye, and along the side of the neck; the lower parts greyish-white. _Male_, 24-1/2, 33. _Female_, 24, 34-1/2. From Texas westward to the Columbia River and northward. Common during autumn and spring. Also throughout the United States, and along the Atlantic shores. Breeds from New York to Labrador and the Fur Countries, as well as along the Great Lakes, and on the Rocky Mountains. Red-breasted Merganser, Mergus Serrator, Wils. Amer. Orn. v. viii. p. 91. Mergus Serrator, Bonap. Syn. p. 397. Mergus Serrator, Red-breasted Merganser, Swains. & Rich. F. Bor. Amer. v. ii. p. 462. Red-breasted Merganser, Nutt. Man. v. ii. p. 463. Red-breasted Merganser, Mergus Serrator, Aud. Orn. Biog. v. v. p. 92. 414. 3. Mergus cucullatus, Linn. Hooded Merganser. Plate CCXXXIII. Male and Female.