Gen. Char. Bill shorter than the head; straight, slender, and depressed, notched at tip. Nostrils open. Tarsi lengthened; exceeding the middle toe; scutellate anteriorly, but with the plates indistinct, claws short, much curved. Wings pointed, longer than tail, and reaching at least to its middle; spurious quill extending farther than the upper covert. Tail emarginate. Olivaceous above; yellowish or whitish beneath.
Phyllopneuste borealis.
For the purpose of distinguishing this genus from any other North American, it is enough to say that, of the general appearance of the warblers, it has a short spurious first primary, as in the Thrushes, and some Vireonidæ. The single species found as yet within our limits resembles at first sight an immature Dendroica æstiva, but is easily distinguished by the wing formula, the yellowish stripe over the eye, and the brown tail-feathers.
Phyllopneuste borealis, Blas.
ALASKA WILLOW WARBLER.
Phyllopneuste borealis, Blas. Ibis, 1862, 69. Phyllopneuste, Kenn., Baird, Trans. Chicago Acad. Sci. I, ii, p. 313, pl. xxx, fig. 2, 1869.
Sp. Char. (Description of specimen No. 45,909.) Plumage in August: above olive-green, with a slight shade of brown on top of head, rather lighter behind; beneath white, tinged with greenish-yellow; more olive on the throat and breast; and more yellow behind, inside the wing and on thighs; axillars purer yellow. A well-marked greenish-yellow line from nostrils over the eye to the nape (extending behind the eye nearly as far as from eye to tip of bill), beneath this an olivaceous streak through the eye, running into the mixed olive and yellowish of the cheeks. Quills and tail-feathers brown, edged with olivaceous; the outer edges of primaries more yellowish than those of secondaries; the greater coverts tipped externally with greenish-yellow, so as to form a distinct band
across the wing. Bill rather dark brown; paler beneath. Legs dark olive; toes not sensibly different. Nest probably on ground, and domed. Eggs white, spotted with pink.
Spurious quill in length about one fourth the second, which about equals the sixth, or very slightly exceeds it; third and fourth longest; fifth a little shorter.