,'34 AME'KICAN WARBLEEiS. 



I saw my first specimen in Waltham on September 14, then 

 again in Belmont on the 21. In the autumn of 1S75 I found 

 them common at Watsontown, Pennsylvania, on September 

 3, at which time the main flight occurred, then they continued 

 to appear in constantly decreasing numbers until the last of 

 the month. In the autumn, the Bay-breasts associate with the 

 Black-polls and other migrating warblers^ thus frequenting 

 birches and other deciduous trees. 



BLACK-POLLED WARBLEK. 



DeiMlroica striata. 

 Plate IV, Fig. 1, male; Fig. 2, female. 



Size, 5.35 to 5.75. Black and white in stripes; top of the 

 head, solid black ; back, grayish. In autumn, greenish, streaked 

 with dusky above and below. Migrates through most of New 

 England to breed in the north. Common in spring, abundant 

 in autumn, 



Mai.e. Grarish above, white beneath, with a narrow white collar extend- 

 ing aTOund neck. Streaked above, on sides of throat and along sides with black. 

 Top of head, solid black. Wing bars, white. 



FiCMALK. Greenish above, greenish- white beneath, streaked above and on 

 sides with dusky. No black crown patch. Wing bars, white. 



Adult Male in Avtumn. Similar to the spring female but rather more 

 greenibh beneath. 



Adult Female in Autumx. Greener than in spring m ith fewer streaks. 



Young of both Sexes in Autumn. Ver}' greenish above and below, 

 with a few streakings above and with faint, dusky markings below. The wing 

 bars in all stages are more or less tinged with greenish, but in the young they 

 are quite greenish, and the feathers of the under tail coverts are slightly tipped 

 with it. 



Nestlings. Similar to the young, but each feather has a central spot of 

 dusky. 



Dimensions. Length, 5.41 ; stretch, 8.80; wing, 2.60; tail. 2.02; bill. 

 -51 ; tarsus, .60. 



