in Various Species of North American Birds. 57 



greenish-olive. Upper tail-coverts clear bluish-gray. Sides of head and 

 entire under parts with a slight wash of brownish-yellow ; otherwise col- 

 ored like the adult. From two specimens in my collection shot at Cam- 

 bridge, Mass., July 18, 1874. It may be well to mention that these birds 

 are in somewhat transitional dress, and have hardly, perhaps, passed from 

 the first plumage, but as the female differs but, little from a specimen of 

 the same sex in the perfected fall dress, taken August 21, 1875, I have 

 thought it best to describe them both as in full autumnal plumage. 



25. Helminthophaga ruficapilla. 



First plumage : female. Bemiges, rectrices, etc., as in adult. Two 

 conspicuous wing-bands of bright buff. Pileum and nape light ashy, 

 tinged with fulvous. Back ashy, just touched with green ; rump bright 

 olive-green. Supra-orbital line, ring around eye, and the throat, bright 

 buff. Lores, maxillary line, and auriculars pale ashy. Breast and cris- 

 sum gamboge-yellow, each feather tipped with whitish, producing a some- 

 what hoary appearance. Abdomen pale yellow ; sides dull cinnamon, 

 with a shade of ashy. From a specimen in my collection taken at Upton, 

 Me., August 14, 1873. A full series of specimens illustrates well the 

 progressive stages. The fall plumage is very quickly acquired by young 

 of this species. 



26. Dendroeca virens. 



First plumage : male. Bemiges and rectrices as in adult ; greater and 

 median wing-coverts just tipped with soiled white, forming two very 

 narrow, indistinct wing-bands. Best of upper parts dark slaty-brown, 

 each feather of the back edged with bright greenish. Superciliary 

 stripes (just meeting in a narrow line on the forehead), eyelids, maxillary 

 line, and chin, bright yellow. Sides of head dark slate ; under parts 

 soiled white, each feather on the breast and sides with a terminal spot of 

 black; on the throat and jugulum, these spots become large blotches of 

 dark slate, the feathers being just tipped and edged with light yellow. 

 From a specimen in my collection shot at Cambridge, Mass., July 30, 

 1875. Like most of the previously described young Warblers, this bird 

 has a narrow central line of yellow feathers extending down the throat 

 and jugulum to the breast. 



27. Dendroeca caerulescens. 



First plumage : male. Bemiges and rectrices as in autumnal males, the 

 former slightly paler in color. Best 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 re- 

 gion, and crissum strong sulphur-yellow. White spot on base of prima- 

 ries fully developed. 



First plumage : female. Bemiges and rectrices as in autumnal female. 



