BIRDS OF EASTERN MASSACHUSETTS. 103 
35. Dendroeca coerulescens, Baird. — Black-throated 
Blue Warhler. Bare during the migrations. Have taken 
it from May 15 th to 24th. I have always found it in mixed 
woods. Although not generally common, I found it quite 
plentiful during the season of 1869.”^ 
36. Dendroeca coronata, Gray. — Yellow-rumped 
Warbler^ Alyrtle-Bird.” Very abundant during the migra- 
tions. Arrives from April 20th to May 5th. I have seen it 
from April 18th until the 1st of June. Appears about the 
last week of September in great numbers, in straggling, de- 
tached flocks j remains until November 1st. Perhaps some 
remain during the winter, at which time I have met with 
it in great numbers in Florida. 
37. Dendroeca castanea, Baird. — Bay-breasted War- 
bler. Exceedingly rare. Possibly breeds, as I have taken 
a male on June 19, 1867. Arrives from May 17th to 22d. 
I have never met with this species in autumn. (See B. 
striata.) Mr. Brewster says that he has taken it in Wolf- 
boro’, New Hampshire, in May. Frequents the woods every- 
where. 
38. Dendroeca Blackburni^, Baird. — Mrs. Black- 
burn's Warbler, Blackburnian Warbler. In some seasons not 
uncommon during the migrations. Arrives from May 17th 
to 27th; departs for the south in September. Found 
everywhere, both in the woods and on apple-trees. 
39. Dendr<^ca pina, Baird. — Pine-creeping War-^ 
bier, Pine Warbler. Common during the migrations. A 
few breed. Arrives from April 9th to 22d ; departs in 
September. Found everywhere. 
40. Dendroeca Pennsylvanica, Baird. — Chestnut- 
sided Warbler. Common summer resident ; breeds com- 
monly. Arrives from May 5th to 1 9th ; departs about the 
second week in September. Found everywhere. 
41. Dendrcsca striata, Baird. — Black-polled War- 
^ Mr. W. Brewster, in MS. 
