228 MEMOIRS OF THE NUTTALL ORNITHOLOGICAL CLUB. 



to Belmont, for they were constantly seen there from late in May up to June 14, 

 when, as I regret to say, both birds were killed. 



Since 1880 the Olive-sided Flycatcher has been met with in the Cambridge 

 Region only during migration and then but rarely. Its withdrawal from our 

 neighborhood cannot be attributed either to the local persecution from which it 

 has undeniably suffered to some extent or to changes in its breeding grounds. 

 At Waverley the woods have remained practically untouched to the present day, 

 and for several years after the last specimen was killed there the birds continued 

 to reappear in their usual numbers, while the little colony at Mount Auburn, as I 

 have already said, was disturbed only by the taking of a few nests, and it ceased 

 to exist before any material changes had been made in its haunts. Moreover 

 the abandonment by the Olive-sided Flycatcher of the localities just mentioned 

 was coincident with its disappearance from Medford, West Newton, Auburndale, 

 Waltham, Concord, and various other towns within twenty miles of Boston, where 

 it was found breeding more or less regularly and commonly during the last 

 ten or fifteen years of its occupancy of the Cambridge Region. The mystery 

 attending its disappearance is not likely to be ever definitely solved, but, as I 

 have stated in connection with a theory advanced in the Introduction to the pres- 

 ent Memoir, I am inclined to believe that the birds which formerly bred in east- 

 ern Massachusetts represented an overflow from other and more congenial 

 summer haunts to which they have since returned. 



121. Contopus virens (Linn.). 

 Wood Pewee. 



Common transient visitor and not uncommon summer resident. 



seasonal occurrence. 



May 10, 1895, one male seen and heard, Arlington, W. Faxon. 



May 18 — September 15. 

 September 27, 1893, one seen, Arlington, W. Faxon. 



NESTING DATES. 



June 10 — 25. 



Although the characteristic haunts of the Wood Pewee are deep, solitary 

 woods, the bird used to breed rather commonly in apple orchards and small, 

 isolated groves of oaks or hickories, on the outskirts of Cambridge. , It was also 



