494 NORTH AMERICAN BIRDS. 



2.30. Hab. Highlands of Guatemala and Mexico, north to southern 

 border of United States (Texas to Arizona). 



651. D. olivacea (Gtikaud). Olive Warbler. 

 b 2 . No white spot at base of quills, or else no other white markings on outer 



surface of wings ; wing less than half as long again as tail. (Subgenus 

 Dendroica Gray.) 

 ■ c 1 . Inner webs of outer tail-feathers with a large patch or broad edging of 

 yellow, but without white. 

 d 1 . Tarsus not more than .75 (usually much less) ; adult male with 

 crown olive-yellow or yellowish olive-green, without distinct 

 orange-rufous suffusion. (Adult males : Above bright yellowish 

 olive-green, the wing-feathers broadly edged with yellow ; rest 

 of plumage pure gamboge-yellow, the chest and sides streaked 

 with chestnut-red. Adult females : Colors duller, the yellow 

 paler, and reddish streaks on lower parts very indistinct or 

 (usually) altogether wanting. Young : Somewhat like adult 

 female, but still duller, the lower parts sometimes dull whitish j 

 the upper parts more grayish. Length about 4.50-5.25, wing 

 2.35-2.65, tail 1.80-2.10. Nest a compact cup-shaped structure 

 of grayish plant-fibres, spiders' webs, etc., lined with plant- 

 down and soft feathers, built in trees (often in orchards or 

 shade trees). Eggs 2-6, .66 X -48, greenish white or very pale 

 greenish, spotted, usually in wreath round larger end, with 

 umber-brown, blackish, and lilac-gray.) 

 e 1 . Deeper colored, the adult male with chestnut streaks on breast 

 and sides much broader and richer, the adult female de- 

 cidedly deeper yellow. Hab. Eastern and northern North 

 America, east of Eoeky Mountains ; in winter, south 

 through' eastern Mexico and Central America to northern 

 South America. 



652. D. sestiva (Gmel.). Yellow "Warbler. 

 e 2 . Paler, the adult male with chestnut streaks on breast and sides 



averaging much narrower and paler, the adult female de- 

 cidedly paler yellowish. Hab. Western North America, 

 east to Eocky Mountains ; in winter, south through west- 

 ern and central Mexico and south at least to Panama. 



— . D. aestiva morcomi Coale. Western 



Yellow Warbler. 1 

 d 2 . Tarsus not less than .75 (usually decidedly more). 



e 1 . Adult males with top of head yellow, the crown sometimes 

 more or less strongly tinged with orange-rufous. 

 f 1 . Wing (male) 2.80, tail 2.45 ; above light yellowish olive- 

 green, becoming nearly pure lemon-yellow on top of 



1 Dendroica (estiva morcomi Coale, Bull. Ridgw, Orn. Club Chic, No. 2, April, 1887, I 



