BIRDS OF THE CAMBRIDGE REGION. 



341 



E. A. and O. Bangs have a young male which they took in Waltham on Sep- 

 tember 16, 1878, and Mr. Walter Faxon saw a single bird in that town (near 

 Prospect Hill) on September 23, 18S9, and another in East Lexington on Sep- 

 tember 19 of the latter year. 



It is not improbable that the Blackburnian Warbler occasionally breeds in 

 the region covered by the present Memoir, for Mr. Faxon found a male in full 

 song from June 3 to 26, 1891, in Tophet Swamp, North Lexington. Only 

 a few miles further to the west and southwest, in Concord and Sudbury, the 

 Blackburnian is a regular and rather common summer resident wherever there 

 are extensive woods of large white pines. 



2 11. Dendroica virens (Gmel.). 

 Black-throated Green Warbler. 



Abundant summer resident. 



SEASONAL OCCURRENCE. 



April 20, 1896, one seen, Belmont, W. Faxon. 



May 1 — October 15. 

 November 3, 1898, one' seen, Cambridge, R. Hoffmann. 



NESTING DATES. 



June 5 — 10. 



Nuttall considered the Black-throated Green Warbler a " rather rare spe- 

 cies,"^ and believed that it bred chiefly to the northward of Massachusetts, 

 although in June, 1830, he met with a nest containing eggs on the Blue Hills at 

 Milton and a pair which " had probably a nest in the vicinity of the woods of 

 Mount Auburn in Cambridge."^ In 1865, and for some ten years later, I 

 found Black-throated Green Warblers breeding sparingly in the region imme- 

 diately to the westward of Mount Auburn, and also in the Pine Swamp. In 

 many parts of Arlington, Belmont, Waverley, Waltham and Lexington, the 

 birds were then, as they have continued to be ever since, among the most abun- 



1 R. Hoffmann, Auk, XVI, 1899, 196. 



2 T. Nuttall, Manual of the Ornitfiology of the United States and of Canada. The Land Birds, 

 1832, 376. 



'/<5;</.,378. 



