. The birds of eastern North America known to occur east of the nineteenth meridian .. . Qolden=winged Warbler. Helmintliophila chrysopiera (mak).See No. 488. Throat, black; crown, dull blue; sides ofbreast, bbiish l)lack: a jiatch of white atbase of primaries. Black=throated Blue Warbler. Dendroica avridesccns (adult male).See No. 497. 298 KEY TO THE ]JIKI>S OF EASTERN NORTH Tlirojit .-ind sides, chestnut; crown, chestnut. Bay=breasted Warbler. Doidruica c<iMnneii (mlull).See No. 503. Throat and sides, more or less marked with chestnut; crown, olive green,streaked with black;

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. The birds of eastern North America known to occur east of the nineteenth meridian .. . Qolden=winged Warbler. Helmintliophila chrysopiera (mak).See No. 488. Throat, black; crown, dull blue; sides ofbreast, bbiish l)lack: a jiatch of white atbase of primaries. Black=throated Blue Warbler. Dendroica avridesccns (adult male).See No. 497. 298 KEY TO THE ]JIKI>S OF EASTERN NORTH Tlirojit .-ind sides, chestnut; crown, chestnut. Bay=breasted Warbler. Doidruica c<iMnneii (mlull).See No. 503. Throat and sides, more or less marked with chestnut; crown, olive green,streaked with black; back, grayisli olive, streaked with black; (crown, withindications of chestnut;) belly, cream white. Bay=breasted Warbler. Dendroica castanfia {femaJe).See No. 503. Throat and underparts, cream white, shading into pale l)uft; white on flanks;crown and back, green, indistinctly streaked with black; wing bars, wliite. Bay=breasted Warbler. Dendroica castanea {immature).See No. 503. Throat and underparts, pale yellowish white ; crown and back, green, indis-tinctly streaked; wing bars, white; often very difficult to distinguish fromimmature specimen of D. castanea. Black=poll Warbler. Dendroica striata {immatnnSee No. 504.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1900