BLUE YELLOW-BACK WARBLER. 159 
f^y****®}! winged insects. Low swampy tliickets are its 
pl^i^es of resort. It is not numerous, and its 
'' 11 ^ undeserving the name of song. It remains 
hs all summer; but its nest has hitherto escaped 
|if5 If leaves us late in September. Some of them 
winter in Oeorgiii, having myself shot several 
. *0 Fehruary, on the hordci’s of the Savannah river. 
(i||A®*'!;th of the yellow red-poll, five inches ; extent, 
’ line over the eye, and whole lower j)art.s, rich 
(if P"" ; breast, streaked with dull rod ; upper part 
Wl reddish chestnut, which it loses in winter ; 
> yellow olive, streaked with duskj' ; rumi), and 
l,f '®®vcrts, greenish yellow; wings, deep blackish 
.''h, exteriorly edged with olive ; tail, slightly foi-ked, 
the same colour as the wings. 
IL* I * female wants the red cap; and the yellow of 
tl)^ ®B'cr parts is less hrilliant ; the streaks of red on 
^•■fiast are also fewer and less distinct. 
'• ^YtriA rUSILLA, WIL 80 K. — S. A^F.niCANAy LATHAM. 
BLUE YELLOW-BACK WARBLEll. 
WILSON, PLATE XYK^UI. I’lG, III. 
habits of this bird partake something of the 
tlij ; but the form of its bill is decisively that of 
genus. It is remarkable for frefjuenting the 
the tallest trees, where it feeds on the small 
'usects and catcrpillai'S tliat infest the young 
'loif* and blossoms. It has a f(!W feeble chirruping 
*®>U'cely loud enough to be heard at the foot of 
in It visits Pennsylvania from the south, early 
V^y ; is very almiulant in the woods of Kentucky ; 
found in the northern paids of the State of 
pi .‘®rk. Its nest I have never yet met with, 
six i \httle species is four inches and a half long, and 
tile b'u * half in breadth ; the front, and betv^ een 
'*®d /* ayes, is black ; the upper part of the head 
a tine Prussian blue ; upper part of the hack, 
*hsh yellow ; lower, and rump, pale blue ; wings 
