137 . 



BLACK-THROATED GREEN WARBLER. 

 SYLVIA riRENS. 

 [Plate XVIL— Fig. 3.] 



Motacilla virens, Gmel. Syst. I, p. 985. — Le Figuier a cravate noire^ Buff. V, 298. — 

 Black -throated Green Flycatcher, Edw. t. 300. — Green Warbler, Arct. Zool. II, Ar;. 297. 

 — Lath. Syn. TV, p. 484, 108. — Turton Syst. p. 607. — Parusviridis gutture nigro, the 

 Green Black-throated Flycatcher, Bartram,/^. 292. 



THIS is one of those transient visitors that pass thro Penn- 

 sylvania, in the latter part of April and beginning of May, on their 

 way to the north to breed. It generally frequents the high branches 

 and tops of trees, in the woods, in search of the larvae of insects 

 that prey on the opening buds. It has a few singular chirrupping 

 notes; and is very lively and active. About the tenth of May it 

 disappears. It is rarely observed on its return in the Fall, which 

 may probably be owing to the scarcity of its proper food at that 

 season obliging it to pass with greater haste; or to the foliage, 

 which prevents it and other passengers from being so easily ob- 

 served. Some few of these birds, however, remain all summer in 

 Pennsylvania, having myself shot three this season, in the montli 

 of June ; but I have never yet seen their nest. 



This species is four inches and three quarters long, and seven 

 broad ; the whole back, crown and hind head is of a rich yellowish 

 green ; front, cheeks, sides of the breast, and line over the eye, yel- 

 low; chin and throat black; sides under the wings spotted with 

 black; belly and vent white; wings dusky black, marked with two 

 white bars; bill black; legs and feet brownish yellow; tail dusky, 

 edged with light ash; the three exterior feathers spotted on their 

 inner webs with white. The female is distinguished by having no 

 black on the throat. 



VOL. II. Mm 



