Dendroica castanea. Descriptions of First Plumage of Certain North American Birds by Wm. Brewster. 30. Dendræca castanea. First plumage: female. Remiges, rectrices, primary coverts, and alulæ as in adult. Pileum, nape, and rump dull brown; back dull olive-green; upper tail-coverts slaty-black. Entire under parts creamy-white, with the slightest possible tinge of clay-color, varying to ashy on the breast. No trace of chestnut on the flanks. Sides of head buff, strongly tinged with greenish on the auriculars and maxillary line. Each feather of the body, both above and beneath, with a large terminal spot of black; the posterior half of abdomen, anal region, and crissum are, however, immaculate. In my collection, from Upton, Me., August 9, 1873. A very complete suite of specimens, taken late in August and early in September, illustrates well the development of the plumage of the young of this species. The spotted feathers of the under parts, with the exception of a narrow line down the centre of the breast, are the first to disappear, and simultaneously with their removal, the chestnut flank-patches become apparent. Next the pileum and nape take on the autumnal green, and last of all the feathers of the back and central line beneath are changed. Adults of this species in fall dress are indistinguishable from the young, except by the more pronounced chestnut on the sides. Bull. N. O. O. 3, April, 1878. p. 59.