SYLVICOLIDA — SYLVICOLINA: TRUE WARBLERS. 303 
parts brownish-olive, streaked with black; the fiery orange of the male not so intense, or 
merely yellow, that on the crown obscure or obsolete. White speculum of the wing resolved 
into two white bars. Sides of the head like the back, instead of black as in the male, and the 
lateral streaks duller and more blended. ¢ and 9, adult, in autumn, are sufficiently similar 
to the respective sexes in spring, but the coloration is toned down, the fiery colors of the male 
being less intense, and the black of the back being much mixed with olivaceous, bringing 
about a close resemblance to the spring female; while the female is duller still, and more im- 
purely colored. Young: Early autumnal birds of the year of this species are very obscure- 
looking, showing no sign of the rich coloration of the adults. Above, like the adult 9, but 
still browner, with more obsolete dusky streaking. Usually an indication of the crown-spot in 
a lightening of the part. Sides of the head like the crown, cutting off a superciliary stripe and 
the eyelids, which are ochrey-white. Whole under parts white, tinged, especially on the throat 
and breast, with yellowish, the sides with obsolete streaking. Indication of the peculiar pat- 
tern of the adults, though without their actual coloration, together with the extent of white on 
the tail-feathers, will usually suffice for the determination of the species, before any orange 
appears on the throat, after which there can be no difficulty. Chiefly Eastern N. Am.; W., 
however, to Utah. Abundant in mixed woodland; breeds in northerly parts of its U. 8. range 
and northward; winters extralimital. One of the later migrants in spring. Nests in bushes 
and low trees; eggs not peculiar. 
D. stria/ta. (Lat. striata, striped. Fig. 166.) Buack-pott WARBLER. 4, adult: Back, 
rump, and upper tail-coverts grayish-olive, heavily streaked with black: whole crown pure 
glossy black. Below, pure white; a double series of black streaks 
starts from the extreme chin, and diverges to pass one on each 
side to the tail, the streaks being confluent anteriorly, discrete 
posteriorly. Side of head above the chain of streaks pure white. 
including lower eyelid. Wings dusky, the primaries with much 
greenish edging, the inner secondaries with whitish edging, the 
greater and median coverts tipped with white, forming two cross- 
bars. Tail like the wings, with rather small white spots at the 
ends of the inner webs of two or three outer feathers. Upper Fic. 166. — Black-poll War- 
mandible brownish-black; lower mandible with the feet flesh-  bler, nat. size. (Ad nat. del. E.C.) 
colored or yellowish. Length 5.25-5.75; extent 8.75-9.30; wing 2.70-2.90; tail 2.25. Q: 
Entire upper parts, including the crown, greenish-olive, with dusky streaks; below, white, 
much tinged with greenish-yellow, especially anteriorly, the streaks dusky and not so sharp as 
those of the male, but still very evident. Bars and edgings of the wings greenish-white. Tail 
as in the male. Rather smaller than the male on an average. Young: Similar to the adult 
Q, but brighter and more greenish-olive above, the streakings few and chiefly confined to the 
middle of the back; below, more or less completely tinged with greenish-yellow, the streakings 
obsolete, or entirely wanting. Under tail-coverts usually pure white. These autumnal birds 
bear an extraordinary resemblance to those of D. castanea (though the adults are so very differ- 
ent), the upper parts being, in fact, the same in both. But young castanea generally shows 
traces of the chestnut, or at least a buffy shade, quite different from the clear greenish-olive of 
_ striata, this tint being strongest on the flanks and under tail-coverts, just where striata is the 
most purely white. Moreover, castanea shows no streaks below, traces at least of which are 
usually observable in striata. N.Am., excepting the Western and most of the Middle Province ; 
N. to the Arctic ocean, Greenland, Alaska; west to Nebraska and Colorado. Winters extra- 
limital. Breeds from northern New England northward. Migrates late in the spring, bringing 
up the rear-guard of the Warbler hosts; when the Black-polls appear in force the collecting 
season is about over! Nests low in spruce-trees and other evergreens; eggs 5, 0.72 X 0.50, 
not peculiar. 
