SUPPLEMENT TO BIRDS OF ESSEX COUNTY l6l 



278 [647] Vermivora peregrina (Wils.). 

 Tennessee Warbler. 

 Common transient visitor. May 17 to June 3 ; September 5 to October i. 



From a " very rare " migrant, with only three records for the County, this 

 bird has become actually common in the last five years. One may see several in 

 the course of a day in the latter part of May. Mr. H. W. Wright saw eight at 

 Nahant on May 26, 1917. 



279 [648a] Compsothlypis americana usneae Brewst. 



Northern Parula Warbler. 



Abundant transient visitor, rare summer resident. April 26 to June 4 ; June, 

 July; September 2 to October 20 (November 6 to 10). 



The unusual November dates are of a bird seen at Manchester by Miss E. 

 D. Boardman. 



280 [650] Dendroica tigrina (Gmel.). 



Cape May Warbler. 



Not uncommon transient visitor. May 7 to May 28; August 18 to Sep- 

 tember 29. 



In the original Memoir I was able to collect only three records for the County. 

 On May 18, 1905, a male Cape May Warbler killed itself against Thatcher's Island 

 Lighthouse and was sent to me. On May 10, 1906, Mr. R. B. Mackintosh recorded 

 this species at Peabody and in 1910, and every year since the species has been not 

 uncommon in both the spring and the fall. 



281 [652] Dendroica aestiva aestiva (Gmel.). 



Yellow Warbler. 



Abundant summer resident. April 30 to September 26; average date of 

 arrival for six years, May 3 to 4. 



Eggs: May 27 to June 13. 



It is probable that most of the Yellow Warblers seen here in September are 

 migrants passing through from the North. I spent the month of August, 191 3, 



