Dendroica caerulescens. Descriptions of First Plumage of Certain North Am. Bbs. Wm. Brewster. 27. Dendræca cærulescens. First plumage: male. Remiges and rectrices as in autumnal males, the former slightly paler in color. Rest of upper parts, including the wing-coverts, dark olive-brown ; sides of head very dark brown ; lores black ; throat, jugulum, lower eyelids, and a very conspicuous supra-orbital line, pale buff ; breast and sides ashy, tinged with olive. Abdomen, anal region, and crissum strong sulphur-yellow. White spot on base of primaries fully developed. First plumage: female. Remiges and rectrices as in autumnal female. Rest of upper parts, including wing-coverts and sides of head, light olive-brown. Lores dull black. Superciliary line, both eyelids, throat, jugulum abdominal and anal regions, with crissum, light buff. Breast and sides olive, tinged with buff. Spot on base of primaries dirty-white. From two specimens, male and female, in my collection, shot with parents at Upton, Me., August 11, 1873. The male above described shows a few black feathers on one side of the throat. Several adult females in my collection, taken both in spring and fall, lack the white wing-patch altogether. Others have it but faintly indicated. Bull. N.O.O. 3, April, 1878. p. 57-58.