408 INSECTIVOROUS BIRDS. 



This very delicately colored species is among the 

 rarest summer residents of the Atlantic states, and does 

 not probably migrate or rather stray farther north than 

 the state of New York. In the Southwestern states, 

 particularly Tennessee and West Florida, it is one of 

 the most abundant species ; it is also found in the West- 

 ern wilderness beyond the Mississippi. Its nest, how- 

 ever, and manners at the interesting period of incuba- 

 tion, are unknown. It is only in the summer that it ever 

 ventures into the Middle States, from which it retires 

 almost before the first chills of autumn, or by the middle of 

 August. It frequents the borders of streams and marshes, 

 and possesses many of the habits of the Flycatchers, 

 warblinff also at times in an under tone like that of the 

 following species. 



Length 4.^ inches ; alar extent 7^. Alove verditer blue (in Audu- 

 bon azure) with a few streaks of black on the upper part of the back. 

 Wings and tail black, edged with pale blue. Tail forked, a white 

 spot in the 5 lateral feathers on each side ; the 2 middle more slightly 

 marked with the same. From the eye backwards a line of dusky 

 blue. Bill dusky above, light blue below. Legs and feet light blue. 

 — Female, with the sides of the breast spotted or streaked with dusky 

 bluish. 



GREEN BLACK-CAPT WARBLER. 



{Sylvia Wilsonii, Bonap. Muscicapa pusilla, Wilsojv, iii. p. 103. pi. 

 26. fig. 4. Phil. Museum, No. 7785.) 



Sp. Charact. — Olive-green ; crown black ; front, line over the 

 eye, and all beneath, yellow ; tail rounded. — Female without the 

 black crown, and dull yellow olive. 



This rare species inhabits the swamps of the Southern 

 States, and is occasionally seen in the lower parts of the 

 states of New Jersey and Delaware. It keeps mostly in 

 the deepest swampy thickets, and has a sharp squeaking 

 note no way musical. It leaves the Southern States early 

 in October. 



