494 XORTH AMERICAN BIRDS. 



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

 border of United Stales (Texas to Arizona). 



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

 v. 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 

 Bendroica Gray.) 

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

 yellow, but without white. 

 d}. 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 broadlj' 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 

 (usuallj") altogether wanting. Young : Somewhat like adult 

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

 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). £ggs 2-6, .60 X -48, greenish white or very palo 

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

 umber-brown, blackish, and lilac-graj'.) 

 e'. Deeper colored, the adiilt male with chestnut streaks on breast 

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

 cidedh- deeper yellow. Hab. Eastern and northern North 

 America, cast of Eocky Mountains ; in winter, south 

 through eastern Mexico and Central America to northern 

 South America. 



652. D. aestiva (Gmel.). Yellow Warbler. 

 e'. Paler, the adult male with client nut streaks on breast and sides 



averaging much narrower and paler, the adult female de- 

 cidedly paler j-ellowish. Hab. Western North America, 

 east to Koekj' Mountains ; in winter, south through west- 

 ern and central Mexico and south at least to Panama. 



— . D. aestiva morcomi Coai,k. Western 

 (82.) Yellow Warbler.' 



d}. Tarsus not less than .75 (usually decidedlj- more). 



e*. Adult males with top of head j-ellow, the crown sometimes 

 more or less strongly tinged with orange-rufous. 

 /'. Wing (male) 2.80, tail 2.45 ; above light yellowish olive- 

 green, becoming nearly pure Icmon-yollow on top of 



' Dcnclroica Ktliva morcomi CoALE, Bull. Ridgw. Orn. Club Chic, No. 2, April, 1SS7, S2. 



