648 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Genus DENDROICA Gray. 



310. Dendroica tigrina (GMEL.). 

 CAPE MAY WARBLER. 



Distr.: Eastern North America, north to Lake Winnipeg and 

 Hudson Bay territory, west to the Plains; breeds from northern 

 New England and southern Ontario northward. 



Adult male: Crown, black in full breeding plumage, usually mixed 

 with olive; back, light olive green, irregularly marked with black; 



rump, yellow; a brownish yellow super- 

 ciliary stripe and a black streak 

 through the eye; sides of head around 

 ear coverts, light chestnut brown, bor- 

 dered below and on sides of neck with 

 clear yellow; under parts, bright yellow 

 (the throat and upper breast usually 

 more or less tinged with brown) , heavily 

 streaked with black, the yellow shading 

 to whitish on the belly; wing coverts, broadly tipped with white, 

 forming a white patch; three outer tail feathers with large white 

 patch on inner webs. 



Adult female: Above, grayish olive, shading to greenish yellow 

 on rump; head marking not like the male; a faint yellowish line 

 over the eye ; white markings on wing coverts and tail much smaller ; 

 throat, pale yellow; under parts, yellowish white, streaked with 

 dusky. 



Length, about 5; wing, 2.70; tail, 1.95; bill, .36. 

 This species is common during the migrations in Illinois and Wis- 

 consin in May and September. 



311. Dendroica aestiva (GMEL.). 



YELLOW WARBLER. 



Distr.: Whole of North America, except British Columbia and 

 Alaska, north to the Mackenzie region, Hudson Bay, and Labrador; 

 breeds nearly throughout its North American range; south in winter 

 to Middle America and aorthern South America. 



Adult male: Upper plumage, bright olive yellow, more yellowish 

 on crown and rump; under parts, bright yellow, streaked with rufous 

 brown; wings, fuscous brown, edged with greenish yellow; greater 

 portion of inner webs of tail feathers, yellow. 



