1871.] 363 [Maynard. 



24. Dendrceea virens Baird. Black-throated Green War- 

 bler. 



Not very common at Norway ( Verrill) , or at Upton during the 

 breeding season. Seen only during the migrations at Quebec (Cou- 

 per), and Hamilton (Mcllwraith). Massachusetts is probably the 

 southern limit of this species during summer. It may breed as far 

 north as the barren ground region. 



25. Dendrceea cserulescens Baird. Black-throated Blue 

 Warbler. 



Common, and breeding at Upton and Quebec (Couper). Not com- 

 mon at Norway during the summer (Verrill). A spring and autumn 

 migrant at Hamilton (Mcllwraith). This is perhaps another north- 

 ern species that finds its southern limits in this region during sum- 

 mer. It winters in the West Indies and adjacent islands, passing 

 through the western section of Massachusetts (Allen) more abun- 

 dantly than the eastern, and so on through the intervening States 

 into Florida. A few remain at Key West all winter. 



26. Dendrceea coronata Gray. Yellow-rumped Warbler. 

 Common during the breeding season at Upton. Breeds. Not known 



to breed at Quebec (Couper), Hamilton fMcIl wraith), or at Nor- 

 way (Verrill). They nest about the second week in June, at Upton. 

 Three nests were found by Mr. H. B. Bailey, on June 7th and 8th. 

 They were all built in low spruce trees, about four feet from the 

 ground; and were rather neat structures, being made of hemlock 

 twigs and lined with a few feathers. They each contained four fresh 

 eggs. Several other nests were taken by Mr. Bailey between the 8th. 

 and 15th. This is also a strictly northern species, but rarely 

 breeds south of the White Mountain Range. They winter in great 

 numbers in Florida and the West Indies, but I did not find it at Key 

 West or on any other of the Florida Keys. 



27. Dendrceea Blaekburnise Baird. Mrs. Blackburn's War- 

 bler. 



Common at Upton. Breeds. Not uncommon at Norway during 

 the summer (Verrill). Seen only on the migrations at Quebec (Cou- 

 per), and Hamilton (Mcllwraith). This highly-colored warbler fre- 

 quents the tops of high trees in the thick woods ; it is therefore 

 difficult to obtain. I think it must build its nest on the topmost 

 limbs of the spruce or hemlock, where it is concealed by the hanging 



