BIRDS OF NOBTH AND MIDDLE AMERICA. 



509 



Adult female. — Above plain yellowish olive-green (usually darker 

 than in adult male), the pileum concolor with the back, or at least not 

 distinctly more yellowish; wings and tail as in adult male, but tips of 

 middle wing-coverts and broad edgings of greater coverts and second- 

 aries less purely yellow, usually yellowish olive-green; under parts 

 paler and duller yellow than in adult male, usually without streaks, 

 but sometimes with a few, usually indistinct, chestnut streaks on chest 

 and sides; length (skins), 102-llJ (108.7); wing, 57-68 (59.6); tail, 

 39^5 (42.2); exposed culmen, 10-11 (10); tarsus, 17-20 (18.6); middle 

 toe, 10-12 (10.8).' 



Young tnale in first OMtumn. — Very similar in coloration to adult 

 females. 



Young female in first autumn. — Similav to duller colored adult 

 females, but duller olive-green above and with under parts dull olive- 

 whitish, slightly tinged with yellow, the under tail-coverts pale yellow. 



Young {nestling). — Above brownish gray or pale grayish brown; 

 wings dusky, the middle and greater coverts broadly tipped with pale 

 yellowish, forming two distinct bands, the greater and primary coverts 

 edged with light olive, the remiges more narrowly and sharply edged 

 with yellowish white; orbital ring, chin, throat, chest, and anterior 

 portion of sides pale buffy grayish, the remaining under parts white, 

 tinged on flanks with pale buff. 



North America in general, except Alaska and north Pacific coast from 

 Vancouver Island northward, and southwestern United States (western 

 Texas to Arizona) ; migrating southward in winter through eastern,Mex- 

 ico and Central America to Colombia (Turbo, Santa Marta, Ocana, 

 Bogota, etc.), Ecuador (Esmeraldas, La Concepcion, Valle del Chota, 

 etc.), Venezuela (Carupano, Lake of Valencia, etc.), northern Brazil 



' Seventeen specimens. 



I am not able to make out satisfactorily a western form [D. ee. morcomi Coale). 

 Western specimens seem, as a rule, to have shorter wings and longer tail than eastern 

 examples, and adult males are often much leas heavily streaked beneath; but the 

 differences appear much too inconstant to justify recognition of a western subspecies. 

 Average measurements are as follows: 



