500 BULLETIN 50, UNITKD STATES NATIONAL MUSETTM. 



etc., more intense. (Santa Lucia, Lesser 

 Antilles. ) . .Dendroica delicata, adults (p. 5SS ) 

 kk. No superciliary stripe of white, yellow, or buff.' 



/. Back more or less streaked (the streaks sometimes con- 

 cealed); wing-bands white or pale yellow. 

 m. Sides of crown (at least behind eyes) black. 

 /(. Sides chestnut; pileum not wholly black. 

 o. Crown olive-yellow; auricular region, throat, and 

 chest white. (Eastern North America, south in 

 winter to Bahamas and Isthmus of Panama.) 



Dendroica pensylvanica, atlults (]>. 589) 

 n(i. Crown chestnut; auricular region black; throat and 

 chest chestnut. (Eastern North America, south 

 in winter tu Colombia.) 



Dendroica castanea, adult male (j). 592) 

 ///(. Sidles white, streaked with black; pileum wholly 

 lilack. (Northern and eastern North America, 

 Miuth over most of South America in winter. ) 



Dendroica striata, adult male (p. 595) 

 villi. Sides of crown not black. 

 //. Under tail-coverts white. 

 <t. Sides of head, sides, and flanks plain pale .ish gray 

 (the flanks sometimes tinged with chestnut). 



Dendroica pensylvanica, immature (p. 589) 

 00. Sides of head, sides, and flanks light olive or else 

 distinctly streaked. 



Dendroica striata, immature (]i. 596) 

 (///. Under tail-co ;erts pale buff. 



Dendroica castanea, adtilt female and immature (p. 592) 

 //. Back plain olive-green, olive, or grayish olive; wing-bands 

 I)ale gray or dull grayish white. ( Dendroica rigorsil. ) 

 IK. Under parts with at least the anterior half yellow; a 

 yellow supraloral streak; upper parts olive-green. 

 n. Wing longer (averaging 72.9), bill and feet smaller 

 (exposed culmen averaging 10.9, tarsus 18.5, mid- 

 dle toe 1 2.7 ) ; yellow of under parts usually extended 

 over abdomen. (Eastern United States and more 

 southern British Provinces.) 



Dendroica vigorsii vigorsii, adult male (p. 599) 

 nil. Wing shorter (averaging not more than 70) , bill and 

 feet larger (exposed culmen averaging 12 or more, 

 tarsus 18.9 or more, middle toe 13.4 or more); yel- 

 low of under parts confined to anterior half. 

 0. Smaller (wing averaging 65.9, tail 54.2, exposed cul- 

 men 12, tarsus 18.9), and duller in color. (Island 

 of New Providence, Bahamas. ) 



Dendroica vigorsii achrustera, adult male (p. 602) 

 00. Larger (wing 70, tail 57, exposed culmen 13.5, tar- 

 sus 20), and brigliter colored. (Island of Abaco, 

 P>ahamas. ) 



Dendroica vigorsii abacoensis, adult male (p. 603) 

 mm. Under parts dull pale grayish, usually tinged with 



' Sometimes (in D. vigorsii and its subs})ecies) tliere is a rather distinct yellow 

 supraloral line. 



