SPECIES 29. SYLVM PUSILLA. 
BLUE YELLOW-BACK WARBLER. 
[Plate XXVIIL— Fig. 3.] 
Parus Americanus, Linn. 8yst. 341. — Finch Creeper, Catesb. i, 
64. — Latham, ii, 558. — Creeping Titmouse, Arct. Zool. 423, 
JVb. 326. — Parus varius, Various coloured little Finch Creeper, 
Bartram, 292.~Peale’s Jl/MseitBi, JVb. 6910,* 
Notwithstanding the respectability of the above authori- 
ties, I must continue to consider this bird as a species of War- 
bler. Its habits indeed partake something of the Titmouse; but 
the form of its bill is decisively that of the Sylvia genus. It is 
remarkable for frequenting the tops of the tallest trees, where it 
feeds on the small winged insects and caterpillars that infest the 
young leaves and blossoms. It has a few feeble chirrupping 
notes, scarcely loud enough to be heard at the foot of the tree. 
It visits Pennsylvania from the south, early in May; is very 
abundant in the woods of Kentucky; and is also found in the 
northern parts of the state of New York. Its nest I have never 
yet met with. 
This little species is four inches and a half long, and six in- 
ches and a half in breadth; the front, and between the bill and 
eyes, is black; the upper part of the head and neck a fine Prus- 
sian blue; upper part of the back brownish yellow, lower and 
rump pale blue; wings and tail black, the former crossed with 
two bars of white, and edged with blue; the latter marked on 
* Parus Jlmericanus, Linn. Syst. Ed. 10, i, p . 190. — Gmel. Syst. i, p . 1007. — 
Lath. Ind. Oni. ii, p 571- — Motacilla americana, Gjiel. Syst. i, 960. — Sylvia 
americana, Ind. Orn. ii, p . 520. — Motacilla ludoviciana, Gmee. Syst. i , p . 983. 
— Sylvia ludoviciana, Lath, ^nd Orn. ii, p . 535. — Figider cendre de la Caroline, 
Buff. PI. Enl. 731, / 1. — Sylvia torquata, Vieile. Ois. de Vdm. Sept. pi . 99. 
