Bill short, straight, very slender, a little broader than high at the base, compressed toward the end; upper mandible nearly straight in its dorsal outline, the edges slightly notched, the tip a little declinate, acute; lower mandible with its outline ascending, nearly straight, the tip acute. Nostrils basal, elliptical, concealed by the reversed feathers. Head large, broadly ovate; neck short; body short. Legs rather long; tarsus slender, longer than the middle toe, much compressed, scutella blended, excepting the lower four toes, rather small, much compressed, hind toe large; lateral equal; claws rather long, arched, much compressed, acute. Plumage very loose and full. Short bristles at the base of the bill. Feathers of the head elongated and silky in the adults. Wings of ordinary length, with the first quill very small, the fourth and fifth longest. Tail of ordinary length, emarginate. 131. 1. Regulus Cuvieri, Aud. Cuvier's Kinglet. Plate LV. Male. Upper parts dull greyish-olive; anterior part of forehead, lore, and a line behind the eye, black; a greyish-white band across the forehead over the eye; a semilunar band of black on the forehead and sides of the head, enclosing a vermilion space; wings and tail dusky, edged with greenish-yellow; secondary coverts, and first row of small coverts tipped with greyish-white; lower parts greyish-white. _Male_, 4-1/4, 6. Pennsylvania. Only one specimen found. Cuvier's Crested Wren, Regulus Cuvierii, Nutt. Man. v. i. p. 416. Cuvier's Regulus, Regulus Cuvierii, Aud. Orn. Biog. v. i. p. 288. 132. 2. Regulus Satrapa, Lichtenstein. American Golden-crested Kinglet. Plate CLXXXIII. Male and Female. Male with the upper parts yellowish-green, changing to ash-grey on the neck and sides of the head, to greenish-yellow on the rump; a band of greyish-white across the anterior part of the forehead, which, at the eye, separates into two bands, one extending over, the other under the eye; above this, a broadish band of black, also margining the head on either side; the inner webs and tips of the feathers of this black band pure yellow; the crown of the head, in the included space, bright orange with silky gloss; a dusky spot at the anterior angle of the eye; an obscure dusky line from the angle of the mouth to beneath the eye; quills and coverts dusky, the former margined with greenish-yellow; secondary coverts and first row of small coverts broadly tipped with yellowish-white; base of all the quills, except the four outer yellowish-white; from the seventh primary to the innermost secondary but two, a broad bar of blackish-brown; tail dusky, the feathers edged with greenish-yellow, lower parts greyish-white. Female differs chiefly in having pale yellow substituted for the flame colour of the crown, and less grey on the hind neck. Young without coloured feathers on the head. _Male_, 4, 7.