272 COUES, BIRDS OF NEW ENGLAND. 



Dendroeca virens Baird. Black-throated Green War- 

 bler. Abundant summer resident. Most numerous during 

 its vernal and autumnal migrations in the more southern 

 districts ; but I have found it breeding abundantly near 

 Portsmouth, N. H. I believe it prefers pine woods dur- 

 ing the breeding season. 



No. 488, $. Essex Co. S. Jillson, 1855. 

 No. 497, ?. " " " " " 



Dendroeca coerulescens Baird. Black-throated Blue 

 Wood Warbler. D. Canadensis of former writers. "Sylvia 

 sphagnosa Bon., or pusilla Wils." (LinsL p. 2.57), is the 

 female or young of this species. Summer resident ; com- 

 mon ; most so during its migrations. Breeds throughout 

 New England; most numerously in its more northern 

 portions. 



No. 514, $, adult. Essex Co. S. Jillson, Spring of 1855. 



Dendroeca coronata Gray. Yellow-rumped Warbler. 

 "Myrtle-bird." Extremely abundant spring and autumn 

 migrant. A few probably winter in more southern sec- 

 tions. Not known to breed except in northern portions 

 (Calais, Me., G. A. Boardmau, Verr., p. 125). The 

 species has been known to occur in Greenland. 



No. 506, $. Essex Co. S. Jillson, 1855. 

 No. 507, $. " " " " " 



Dendroeca JBlackbumiCB Baird. Mrs. Blackburn's 

 Warbler. Summer resident ; not rare. 



The Hemlock Warbler, " SylvicolaparusA\\dt" (Emm., 

 p. 3; Peab., p. 310; Putn.,p. 226; LinsL, p. 257, etc.), 

 is the young of this species. 



No. 495, $. Essex Co. S. Jillson, 1855. 

 No. 518, ?. " " " " " 



Dendroeca castanea Baird. Bay-breasted Warbler. 

 Not common. Breeds, at least in more northern sections, 

 but is chiefly seen in spring and fall. 



The Autumnal Warbler (Sylvia autumnalis Wils., 

 Aud.) of local writers is the young of this species. 



No. 515, $. Essex Co. S. Jillson, 1855. 

 No. 485, $. " " 



Dendroeca pina Baird. Pine-creeping Warbler. 

 Common summer resident ; arriving very early, and re- 



