BLUE-GREEN WARBLER. 
393 
The Hemlock Warbler is about 5 J inches long, and 8 in alar extent. 
Above yellow-olive, spotted with black. The belly of a paler yel- 
low than the breast, and streaked with dusky ; round the breast some 
small streaks of blackish. Wings black, the greater coverts and 
next superior row broadly tipt with white, forming 2 bars ; prima- 
ries edged with olive, tertials with white. Tail-coverts black, tipt 
with olive ; the tail slightly forked, and also edged with olive. Bill 
black above, pale below. Legs and feet dusky yellow. Iris hazel, 
— The greater quantity of white on the wing and tail, and yellow 
on the head, are all the essential marks which in any way distin- 
guish this supposed species from the Pine Warbler. 
BLUE MOUNTAIN WARBLER. 
(Sylvia tigrina, Lath. S. montana , Wilson, v. p. 113. pi. 44. fig. 2* 
[male.] 
Sp. Charact. — Yellow-olive ; front, cheeks, chin, and sides of the 
neck yellow ; breast and belly pale yellow, streaked with dusky ; 
wings with 2 white bars, and with the rounded tail black ; the 2 
lateral tail-feathers white on the inner yanes below the summits. 
This is another very rare species allied to the Pine 
Warbler, which visits the United States during Summer, 
Its habits are much the same as the preceding, and its 
song a feeble scree p, three or four times repeated. Its 
rounded tail is a striking external trait of distinction. 
It is 4| inches long. Vent pale yellow; quills edged with whitish; 
tail edged with pale olive. Bill dark brown. Legs and feet purple 
brown. Iris hazel. — Female unknown. 
BLUE-GREEN WARBLER. 
( Sylvia rara : Wilson, iii. p. 119. pi. 27. fig. 2. Audubon, pL 49. 
Orn. Biog. i. p. 258. Phil. Museum, No. 7788.) 
Sf. Charact. — Pale greenish blue ; lores, line over the eye, and all 
beneath white ; wings with 2 white bars, and with the emargina- 
ted tail blackish-brown ; the 3 lateral tail-feathers with a white 
patch near the extremities of the inner vanes. 
