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 (GiravuD). Olive Warbler. 
b%. No white spot at base of quills, or else no other white markings on outer 
(82.) 
surface of wings; wing less than half as long again as tail. (Subgenus 
Dendroica 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 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, 
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.) 
ée'. 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 Rocky Mountains; in winter, south 
through eastern Mexico and Central America to northern 
South America. 
652. D. estiva (GmEL.). Yellow Warbler. 
é. 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 Rocky Mountains; in winter, south through west- 
ern and central Mexico and south at least to Panama. 
—. D. estiva morcomi Coats. Western 
Yellow Warbler.’ 
a. Tarsus not less than .75 (usually decidedly more). 
é. Adult males with top of head yellow, the crown sometimes 
more or less strongly tinged with orange-rufous. 
1. Wing (male) 2.80, tail 2.45; above light yellowish olive- 
g ght y' 
green, becoming nearly pure lemon-yellow on top of 
1 Dendroica xstiva morcomi Coaxe, Bull. Ridgw. Orn. Club Chic., No, 2, April, 1887, 82. 
