Male, 51/4, wing, 25/12.
North California.
Delafield's Yellow-throat, Sylvia Delafieldii, Aud. Orn. Biog. v. v. p. 307.
GENUS IV. HELINAIA, Aud. SWAMP-WARBLERS.
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.
Plate CXCVIII. Male.
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.
Male, 51/4, 81/2.
South Carolina to Massachusetts. Very rare. Migratory.