562 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Dmdroeca townsendi Sundevall, Of v. k. Vet.-Ak. Forh. Stockh., xxvi, 1870, 610 



(monogr. ). 

 [Vendroeca] townsendii CouBS, Key N. Am. Birds, 1872, 98. 

 [Dendrceca] townsendi Sclater and Salvin, Nom. A v. Neotr., 1873, 9. 

 [Dendrceca] townsendi Codes, Key N. Am. Birds, 2d ed., 1884, 299. 



DENDROICA VIRENS (Gmelin). 

 BLACE-TEROATED GREEN WARBLER. 



Adult male in spriiig and summer. — Pileum, hindneck, back, scapu- 

 lars, and ramp plain yellowish olive-green, the back sometimes (more 

 rarely the pileum and rump also) narrowly streaked with black, and 

 the forehead sometimes with an elongated or oval median spot of yel- 

 lowish; sides of head and neck, including whole malar region and a 

 broad superciliary stripe, clear lemon-yellow, relieved by a more or 

 less broad postocular streak of 'olive-green, this sometimes involving 

 greater part of the auricular region; chin, throat, and chest (some- 

 times sides of breast also) uniform black, the first sometimes partly 

 j'ellow; rest of under parts white or yellowish white, the breast usu- 

 ally tinged (sometimes strongly) with yellow; sides and flanks heavily 

 streaked with black, the more anterior of these streaks usually con- 

 fluent with the black throat-patch at its postero-lateral portions; wings 

 . and tail dusky with slate-gray edgings, the middle and greater wing- 

 coverts broadly tipped with white, forming two conspicuous bars 

 across wing; inner webs of two lateral rectrices mostly white, that of 

 the third with a large white terminal spot, the two outermost with 

 outer webs extensively white; bill blackish; iris brown; legs and feet 

 dark horn brown (in dried skins). 



AdAilt male in autumn a,nd viinter. — Similar to the spring and sum- 

 mer plumage, but with feathers of the black throat-patch narrowly 

 tipped, or margined terminally, with whitish.' 



Adndt female i/n spring and summer. — Similar to the adult male of 

 corresponding season, but chin and more or less of throat usually 

 whitish or pale yellowish, the black of lower throat (if present there) 

 and chest more or less broken (sometimes almost . hidden) by whitish 

 tips or terminal margins to the feathers; sides of breast never (?) uni- 

 form black. 



Young male in first autumn and wlntei'. — Very similar in coloration 

 to the adult female, but olive-green of upper parts and yellow on sides 

 of head brighter, and under parts more strongly tinged with yellow. 



Adult (%) female in autumn and winter. — Similar to the spring and 

 summer plumage, but throat pale dull yellowish, more or less spotted 

 or blotched laterally and posteriorly with dusky olive, yellow on sides 

 of head paler, and dusky streaks on sides and flanks less distinct. 



' These whitish terminal margins sometimes persist until April, but usually disap- 

 pear before then. 



