248 
CHESTNUT-SIDED WARBLER. 
seen in this part of Pennsylvania, that few even of our own 
writers have mentioned it. 
I lately received a very neat drawing of this bird, done by 
a young lady in Middleton, Connecticut, where it seems also 
to be a rare species. 
CHESTNUT-SIDED WARBLER. 
SYLVIA PENNSYLVANICA Plate XIV. Fig. 5. 
Linn. Syst. 333. — Red-throated Flycatcher, Edw. 301. — Bloody-side Warbler, 
Turton, Syst. i. p. 596. — Le figuier a poitrine rouge, Luff. v. 308. — JBriss. 
Add. 105. — Lath. ii. 489. — Arct. Zool. p. 405, No. 298. — Peale's Museum, 
No. 7006. 
SYL VICOLA ICTEROCEPHALA. — Swainson. 
Sylvia icterocephala, J Bonap. Synop. p. 80. — The Chestnut -sided Warbler, And. 
pi. 59. ; Orn. J3iog. p. 306. 
Of this bird I can give but little account. It is one of those 
transient visitors that pass through Pennsylvania in April and 
May, on their way farther north to breed. During its stay 
here, which seldom exceeds a week or ten days, it appears 
actively engaged among the opening buds and young leaves, 
in search of insects,* has no song but a feeble chirp, or twitter ; 
and is not numerous. As it leaves us early in May, it pro- 
bably breeds in Canada, or, perhaps, some parts of New 
England ; though I have no certain knowledge of the fact. 
In a whole day’s excursion, it is rare to meet with more than 
one or two of these birds ; though a thousand individuals of 
some species may be seen in the same time. Perhaps they 
may be more numerous on some other part of the continent. 
The length of this species is five inches, the extent, seven 
and three quarters. The front, line over the eye, and ear- 
feathers, are pure white ; upper part of the head, brilliant 
yellow ; the lores and space immediately below are marked 
with a triangular patch of black ; the back and hind head are 
streaked with gray, dusky black, and dull yellow; wings, 
