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. Remiges, 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. Dendrceca virens. 
First plumage : male. Remiges and rectrices as in adult ; greater and 
median wing-coverts just tipped with soiled white, forming two very 
narrow, indistinct wing-bands. Rest 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. 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 re- 
gion, and crissum strong sulphur-yellow. White spot on base of prima- 
ries fully developed. 
First plumage : female. Remiges and rectrices as in autumnal female. 
