BLUE-GREEN WARBLER. 393 



The Hemlock Warbler is about 5^ 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 j 

 wings with 2 white bars, and with the rounded tail black ; the 2 

 lateral tail-feathers white on the inner vanes 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 screep, 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 vara, Wilson, iii. p. 119. pi. 27. fig. 2. Audubon, pi. 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 iuner vanes. 



