CJERULEAN WARBLER. 
143 
flycatchers, sufficient to make them ail object worth 
speculation, we are likely to know as little of them 
hereafter as at present. 
This species is five inches long*, and seven and a half 
broad, and is wholly of a fine light slate colour above ; 
the throat, cheeks, front and upper part of the breast, 
are black ; wings and tail, dusky black, the primaries 
marked with a spot of white immediately below their 
coverts ; tail, edged with blue ; belly and vent, white ; 
legs and feet, dirty yellow ; bill, black, and beset with 
bristles at the base. The female is more of a dusky 
ash on the breast; and, in some specimens, nearly 
white. 
They, no doubt, pass this way on their return in 
autumn, for I have myself shot several in that season ; 
but as the woods are then still thick with leaves, they 
are much more difficult to be seen, and make a shorter 
stay than they do in spring. 
112 . SYLVIA CuEKULEA, WILSON. — S. AZUKEA, STEPHEN. 
C CERULEAN WARBLER. 
WILSON, PLATE XVII. FIG. V. — MALE. 
This delicate little species is now, for the first time, 
introduced to public notice. Except my friend, Mr 
Peale, I know of no other naturalist who seems to have 
hitherto known of its existence. At what time it 
arrives from the south, I cannot positively say, as I 
never met with it in spring, but have several times 
found it during summer. On the borders of streams 
and marshes, among the branches of the poplar, it is 
sometimes to be found. It has many of the habits of 
the flycatcher ; though, like the yellow-rump warbler, 
from the formation of its bill, we must arrange it 
with the warblers. It is one of our scarce birds in 
Pennsylvania, and its nest has hitherto eluded my search. 
I have never observed it after the 20th of August, and 
therefore suppose it retires early to the south. 
This bird is four inches and a half long, and seven 
