SPECIES 17. SYLVM CJERVLE^. 
CERULEAN WARBLER. 
[Plate XVII. — Fig. 5.] 
Pk ale’s Museum, JVo. 7309. 
This delicate little species is now, for the first time, intro- 
duced 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 seve- 
ral 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 preceding, 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 twentieth of August, and there- 
fore suppose it retires early to the south. 
This bird is four inches and a half long, and seven and a half 
broad; the front and upper part of the head is of a fine verditer 
blue; the hind head and back of the same colour, but not quite 
so brilliant; a few lateral streaks of black mark the upper part 
of the back; wings and tail black, edged with sky blue; the three 
secondaries next the body edged with white, and the first and 
second row of coverts also tipt with white; tail coverts large, 
black, and broadly tipt with blue; lesser wing coverts black, 
also broadly tipt with blue, so as to appear nearly wholly of 
that tint; sides of the breast spotted or streaked with blue; belly, 
chin and throat pure white; the tail is forked, the five lateral 
feathers on each side with each a spot of white, the two middle 
more slightly marked with the same; from the eye backwards 
VOL. II. — z z 
