114 
SYLVIA AZUREA* 
group, very distinct from the true Sylvia , of which 
S. atricapilla may he considered as the type. We 
presume that it is the group we have in view, to which 
Mr Swainson has given the name of Sylvicola , in his 
Synopsis of Mexican birds. Our species is erroneously 
placed by Buffon among his Demi-fins , corresponding 
to our Dacnis , and Wilson’s Worm-eaters . 
25. SYLVIA AZULEA, STEPHENS. 
FEMALE CASRULEAN WARBLERi 
BONAPARTE, PLATE XI. FIG. II. 
The merit of having discovered this bird, is entirely 
due to the Peale family, whose exertions have contri- 
buted so largely to extend the limits of natural history. 
The male, which he has accurately described and 
figured, was made known to Wilson by the late vene- 
rable Charles Wilson Peale, who alone, and unaided, 
accomplished an enterprise, in the formation of the 
Philadelphia Museum, that could hardly have been 
exceeded under the fostering hand of the most powerful 
government. To the no less zealous researches of Mr 
Titian Peale, the discovery of the female is recently 
owing, who moreover evinced his sagacity by deter- 
mining its affinities, and pointing out its true place 
in the system. Although it preserves the principal 
characters of the male, yet the difference is sufficiently 
marked to deserve especial notice in this work. 
The present specimen was procured on the banks of 
the Schuylkill, near Mantua village, on the 1st of 
August, 1825. It was very active, skipping about on 
the branches of an oak, attentively searching the leaves, 
and crevices of the bark, and at intervals taking its 
food on the wing, in the manner of the flycatchers. It 
warbled in an under tone, not very unlike that of the 
blue-gray flycatcher of Wilson, ( Sylvia ccerulea , L.) 
a circumstance that would lead to the supposition of 
its being a male in summer dress ; but on dissection it 
proved to be a female. 
