BIRDS OF THE CAMBRIDGE REGION. 345 



During the very last days of September and the first week of October the 

 two forms sometimes occur together, but true palmarum is ordinarily met with 

 either singly or in company with birds of its own kind. It is a curious fact that 

 thus far it has been found in eastern Massachusetts only in autumn. 



214. Dendroica palmarum hypochrysea Ridgw. 

 Yellow Palm Warbler. Yellow Redpoll Warbler. 



Transient visitor in spring and autumn, usually common, sometimes abundant. 



seasonal occurrence. 



April 7, 1866, two adults taken, Watertown, W. Brewster. 



April 1 5 — May 5, 

 May 20, 1875, o"6 female seen, Belmont, W. Brewster. 

 May 20, 1892, one taken. Lower Mystic Pond, W. Faxon. 



September 25, iSgo, two' taken, Belmont, W. Faxon. 



October i — 15. 

 October 22, 1871, several seen, one taken, Cambridge, W. Brewster. 



Yellow Palm Warblers visit the Cambridge Region with unfailing regularity 

 in spring and autumn, although their numbers vary greatly from year to year. 

 Sometimes only a very few are reported, but in spring they are usually common 

 and occasionally really abundant. On April 25, 1868, during a brief but heavy 

 snowstorm, I found them by hundreds at Fresh Pond where, in company with an 

 even greater number of Yellowrumps, they had congregated on a narrow strip 

 of bare, pebbly beach at the water's edge. It is of course exceptional to see any- 

 thing like so many together, but one may often meet with fifteen or twenty in a 

 single flock or forty or fifty in the course of a morning walk. In spring they 

 associate freely with the Myrtle Warblers, and hence frequent much the same 

 places, although they resort rather less to upland woods and are even more given 

 to haunting thickets near water, and to venturing out into fields or pastures 

 where they sometimes occur hundreds of yards from any cover. I have not seen 

 them of late years in our garden, but Miss Bertha T. Parker tells me that they 

 continue to visit Norton's Woods. Their favorite haunts in autumn are barren 

 tracts sparsely covered with gray birches. At the latter season they do not 

 linger with us so late as do the Yellowrumps, although they appear quite as 

 early in spring. 



' Nos. 29,515 and 29,516, collection of William Brewster. 



