_Specific Character._--Bill blue, from the corner of the mouth to the end about one inch and a half, the sides rounded, narrowed towards the point; head thickly crested, a patch behind the eye and a band on the wings white. Adult male with the plumage of the head and neck thick, and long forehead; loral space and hind neck rich glossy green, changing into purple on the crown and sides of the head; from the eye backwards over the head a triangular patch of white; the entire breast and sides of the body pure white; abdomen dusky white; tail rounded, greyish-brown; upper tail-coverts lighter; under tail-coverts soiled white; back and wings black, with a patch of white on the latter. Female upper plumage sooty-brown, with a band of white on the sides of the head; outer webs of a few of the secondaries same color; lower part of the fore neck ash-color; breast and abdomen soiled white; tail feathers rather darker than those of the male. Male fourteen and a half inches long; wing six inches and three-fourths. Female rather smaller. The dipper is quite plentiful everywhere in the Northern States, but not much valued. OLD WIFE. South Southerly, Old Squaw, Long-Tailed Duck. _Fuligula Glacialis_, Linn. _Specific Character._--Length of bill, from the termination of the frontlet feathers to the point, one inch and one-sixteenth--the upper mandible rounded; the sides very thin; the bill rather deeply serrated, and furnished with a long nail; tail feathers acute. In the male the middle pair of tail feathers are extended about four inches beyond the next longest, which character is wanting with the female. Adult male with the bill black at the base; anterior to the nostril reddish-orange, with a dusky line margining the nail; fore part of the head white, the same color passing over the head down the hind neck on the back; eyes dark red; cheeks and loral space dusky-white, with a few touches of yellowish-brown; a black patch on the sides of the neck terminating in reddish-brown; fore neck white; breast brownish-black, terminating in an oval form on the abdomen--the latter white; flanks bluish-white; primaries dark brown; secondaries lighter brown, their coverts black; a semi-circular band of black on the fore part of the back; the outer two tail feathers white--the rest marked with brown, excepting the four acuminated feathers, which are blackish-brown, the middle pair extending several inches beyond the others. Female without the long scapulars or elongated tail feathers; bill dusky-green; head dark, greyish-brown--a patch of greyish-white on the sides of the neck; crown blackish; upper parts dark greyish-brown; lower parts white. Length of male from the point of the bill to the end of the elongated tail feathers twenty-three inches; wing eight inches and five-eighths. Female about six inches less in length. This bird is abundant along the coast, but is generally tough and fishy. MERGANSER. _Genus Mergus_, Linn.