82 DELAFIELD'S GROUND-WARBLER. 



shorter than it; the other primaries very slowly graduated, the longest or 

 third being only five-twelfths longer than the first secondary; all the quills 

 are rounded. Tail rather long, straight, much rounded, the lateral feathers 

 being half an inch shorter than the middle. 



Upper mandible blackish-brown, with the edges yellowish flesh-colour; 

 lower mandible of the latter colour, slightly dusky at the point. A band of 

 black passes across the forehead, includes the loral space and eyes, and 

 terminates on the ear-coverts. The upper part of the head is light greyish- 

 blue, tinged behind with green; the rest of the upper parts dull greyish-olive; 

 the quills and tail-feathers wood-brown, the edge of the wing, and the margin 

 of the outer primary, yellow. The fore part of the neck, and all the lower 

 parts, rich yellow, excepting the sides, which are shaded into dull yellowish- 

 green, and the lower wing-coverts and axillaries, which are nearly white. 



Length to end of tail 5i inches; bill along the ridge -ff , along the edge of 

 lower mandible ^; wing from flexure 2 T 5 2 ; tail 2 J; tarsus T |; hind toe y|, 

 its claw y|; middle toe yf, its claw ■}%. 



This species has the bill much stronger and more elongated than Trichas 

 Marilandica; its wings are much more rounded, the first quill being nearly 

 five-twelfths shorter than the third, whereas in the latter it is scarcely a 

 twelfth and a half shorter; its tail is more rounded; and its tarsi and toes are 

 proportionally larger. The colours are, however, similar; but the present 

 species has no whitish band margining the black band on the head, and this 

 latter band is much narrower in front, and does not proceed so far down the 

 neck, extending only to the distance of four and a half twelfths from the eye, 

 whereas in T. Marilandica it extends to the distance of half an inch. 



GENUS IV.— HELINAIA, Jiud. 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 



