182 BIRDS OF OHIO. 
passing north. It returns early in September and remains 
until the last week of the month. 
253. (660.) DENDROICA CASTANEA (Wils.). 45. 
Bay-breasted Warbler. 
Synonyms: Dendrceca castanea, Sylvia castanea, Sylvicola cas- 
tanea. 
Bay-breast. 
Kirtland, Ohio Geol. Surv., 1838, 163, 181. 
Apparently this warbler is not well enough known to 
make .any statements of its spring migrations reliable. In 
Lorain county it is fairly common every spring, and usually 
more numerous in the autumn. That seems to be the gen- 
eral verdict, except that in many places the species is not 
at all common. The whole warbler group is perhaps less 
known by the average bird student than any other. The 
reason for this lack of acquaintance is not easy to explain, 
because the usually bright patchy coloring of these birds 
makes them somewhat conspicuous. Their small size and 
arboreal habits, and the difficulty of detecting them among 
the foliage, doutbless contribute largely to the difficulties. 
This is among the later arrivals in spring, not appearing 
in Lorain county before May 5, generally, and has gone 
northward by the 23d. In its southward migrations it 
reaches Ohio about the middle of August, and tarries in the 
southern counties until the middle of October. 
254. (661.) DENDROICA STRIATA (Forst.). 46. 
Black-poll Warbler. 
Synonyms: Dendreeca striata, Sylvia striata, Sylvicola striata, 
Muscicapa striata. 
Black-poll. 
Kirtland, Ohio Geol. Surv., 1838, 163, 182. 
This warbler arrives even a little later in spring than the 
Bay-breast, and is frequently associated with it. Judging 
from the reports it is a little more numerous in spring and 
fully so in the autumn. Fall specimens of these two warb- 
lers are so nearly alike that one not well acquainted with 
