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GENUS HELINAIA — AUDUBON. 



SWAMP WARBLER. 



[In these birds the bill is nearly as long as the head, compressed toward the 

 end, and tapering to a very acute point; wings rather long; tail of moderate 

 length, nearly even.] 



HELINAIA SOLITARIA— WILSON. 



BLUE-WINGED YELLOW SWAMP WARBLER. 



Blue-winged Yellow Warbler, Wils. Amer. Orn. 



Sylvia soiiiaria, Bonap. Syn. 



Blue-winged Yellow Warbler, Nutt. Man. 



Blue-winged Yellow Warbler, Sylvia solitaria, Aud. Orn. Biog. 



Specific Character — Bill straight, tapering to a very acute point 

 — both mandibles black ; toward the point, lighter ; third 

 quill longest ; second longer than the fourth ; forehead, crown, and 

 lower parts bright yellow ; loral space black ; two white bands on 

 the wings. Adult with the forehead and crown rich yellow ; up- 

 per parts, including the hind neck and occiput, bright green, with 

 a tinge of yellow on the rump ; loral space black ; wings and tail 

 grayish-blue, the tips of the secondary coverts and those of the first 

 row of small coverts white ; a patch of Avhite on the four outer tail 

 feathers, occupying nearly all the inner webs of the first two, con- 

 fined 10 about one-third of the inner Aveb of the third, diminishing 

 to a small spot on the inner Aveb of the fourth ; lower parts bright 

 yellow ; lower tail coverts white, faintly tinged with yellow. 

 Young with the forehead and upper parts yellowish-green ; lower 

 parts tinged with green. Length five inches, wing two and a half. 



The birds of this class are readily detected by the form of the 

 bill. The Genus consists, as far as described, often species, only 

 four of which I have been able to procure on Long Island, although 

 I should not be surprised to hear of others occurring here — as, for 

 instance, a single specimen of the Tennessee Warbler {H. 

 peregrina] was shot by Mr. Bell in Rockland County, and it is not 



