From Texas northward to Nova Scotia, and throughout the interior; Columbia River.
Maryland Yellow-throat, Sylvia Marilandica, Wils. Amer. Orn. v. i. p. 88, Male; v. ii. p. 163, Female.
Yellow-breasted Warbler, or Maryland Yellow-throat, Sylvia Trichas, Aud. Orn. Biog. v. i. p. 121, Adult; v. v. p. 463.
Roscoe's Yellow-throat, Sylvia Roscoe, Aud. Orn. Biog. v. i. p. 124. Young.
103. 4. Trichas Delafieldii, Aud. Delafield's Ground-Warbler.
Wing rather long, much rounded, with the third and fourth quills longest, sixth longer than second, first and tenth about equal; tail much rounded, the lateral feathers being half an inch shorter than the middle. Male with a band of black across the forehead, including the loral space and eyes, and terminating on the ear-coverts; upper part of head light greyish-blue, tinged behind with green; the rest of the upper parts dull yellowish-green; quills and tail-feathers wood-brown on the inner webs, the edge of the wing and margin of the outer primary yellow; all the lower parts rich yellow, excepting the sides, which are shaded into dull greenish-yellow.
Delafield's Yellow-throat, Sylvia Delafieldii, Aud. Orn. Biog. v. v. p. 307.
Bill rather long, being nearly of the same length as the head, straight, or slightly decurved, tapering to a very acute point, much compressed; the upper mandible with the ridge distinct, the sides declinate and flat at the base, the edges somewhat inflected beyond the middle, the notch obsolete; lower mandible with the dorsal line straight, the edges involute, the tip extremely acute. Nostrils oblong; exposed. Feet of moderate length; tarsus about equal to the middle toe and claw, slender, much compressed, with the upper scutella blended; toes slender; claws rather long, moderately arched, slender, much compressed, laterally grooved, extremely acute, plumage soft and blended. Bristles obsolete. Wings rather long, somewhat pointed, the outer three nearly equal, the second longest. Tail of moderate length, nearly even.--Name from [Greek: Helos], a swamp, and [Greek: Naiô], to inhabit.
104. 1. Helinaia Swainsonii, Aud. Swainson's Swamp-Warbler.
Bill as long as the head, much compressed; wings rather long, second and third quills equal and longest; tail even; upper parts olive-brown, the head strongly tinged with red; lower parts and a band over the eye pale yellowish-grey, the feathers on the cheeks tipped with brown, the sides of the neck and body more grey, the abdomen whitish.