SPECIES 9. SYLVIA PENNSYLVANICA. 
CHESTNUT-SIDED WARBLER. 
[Plate XIV.— Fig. 5.] 
Linn. Syst. 333. — Red-throated Flycatcher, FiDW. SOI. — Bloody- 
side Warbler, Turton, Syst. i,p. 596. — La figuier a poitrine 
rouge. Buff, v, 308. — Briss. App. 105. — Lath, ii, 490. — Arct. 
Zool.p. 405, JVo. 298. — Peale’s JSTo. 7006."* 
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 probably 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, is marked with a triangular patch 
of black; the back and hind head is streaked with gray, dusky, 
* Additional synonymes: — Molacilla iclerocephala , Linn. Syst. i , p . 325. — 
Gmei,. Syst. i , p . 980. — Sylvia icterocephala,L, Ain. hid. Orn. ii, p . 538. — Vieil, 
Ois. de VJlm. Sept. pi . 90. — Sylvia Pennsylvanica, Gmel. Syst. r, p. 971. — Lath. 
fnd. Orn. ii, p . 540. — Ficedula Canadensis icterocephalas, Bkiss. hi, p. 517, 64, 
t. 27, /. 2. — Id. 8vo. i, p. 451. — Ficedula pennsylvanica icterocephalas, Bbiss. 
Jpp. p. 105. — Id. 8vo. I, p. 458, 78. 
