BLUE-GREEN WARBLER. 199 



wings dark dusky olive ; primaries and greater coverts edged and 

 tipped with pale yellow ; second row of coverts wholly yellow ; lesser, 

 olive ; tail deep brownish black, lighter on the edges, the three exterior 

 feathers broadly spotted with white. 



The female is destitute of the black mark under the eye ; has a few 

 slight touches of blackish along the sides of the neck ; and some faint 

 shades of brownish red on the back. 



The nest of this species is of very neat and delicate workmanship, 

 being pensile, and generally hung on the fork of a low bush or thicket ; 

 it is formed outwardly of green moss, intermixed with rotten bits of 

 wood and caterpillars' silk ; the inside is lined with extremely fine fibres 

 of grape-vine bark ; and the whole would scarcely weigh a quarter of 

 an ounce. The eggs are white, with a few brown spots at the great end. 

 These birds are migratory, departing for the south in October. 



Species XXVII. SYLVIA RARA. 



BLUE-GREEN WARBLER. 



[Plate XXVII. Fig. 2.] 



This new species, the only one of its sort I have yet met with, was 

 shot on the banks of Cumberland river, about the beginning of April ; 

 and the drawing made with care immediately after. Whether male or 

 female I am uncertain. It is one of those birds that usually glean 

 among the high branches of the tallest trees, which render it difficult to 

 be procured. It was darting about with great nimbleness among the 

 leaves, and appeared to have many of the habits of the Flycatcher. 

 After several inefiectual excursions in search of another of the same 

 kind, with which I might compare the present, I am obliged to intro- 

 duce it with this brief account. 



The specimen has been deposited in Mr. Peale's museum. 



The Blue-green Warbler is four inches 'and a half long, and seven 

 and a half in extent ; the upper parts are verditer, tinged with pale 

 green, brightest on the front and forehead ; lores, line over the eye, 

 throat, and whole lower parts very pale cream ; cheeks slightly tinged 

 with greenish ; bill and legs bright light blue, except the upper mandi- 

 ble, which is dusky ; tail forked, and, as well as the wings brownish 

 black ; the former marked on the three exterior vanes with white and 

 edged with greenish ; the latter having the first and second row of 

 coverts tipped with white. Note a feeble chirp. 



