ORANGE-CROWNED WARBLER. 
107 
The female Cape May warhler may be very easily 
mistaken for an imperfect Sylvia coronata, of which 
four or live nominal species have alreacty been made. 
The striking’ resemblance it bears to the young’, and to 
the autumnal condition of the plumage in that species, 
requires a few comparative observations to prevent 
their being confounded together. 
The present bird is smaller than the coronata , with 
a more slender, and rather more elongated bill ; it is 
altogether destitute of the yellow spot on the head, as 
well as of the yellow on the rump, which is a striking 
character of the coronata in all its states, and gives 
rise to the English name adopted by Wilson. 
The colour of the outer edging of the wing and tail 
feathers is a very good distinctive mark ; in the maritima 
it is olive green, whilst in the coronata it is white. 
The white spot on the inner webs of the exterior tail 
feathers, is also four times larger in the coronata than 
in the maritima . 
23 . SYLVIA CEL A TA , BONAP ORANGE-CROWNED WARBLER. 
BONAPARTE, PLATE V. FIG. II. 
This little bird, discovered, early in May, at Engineer 
Cantonment, on the Missouri river, was first described 
and named by Say ; the species was not uncommon at 
that season, and appeared to be on its passage farther 
north. It is more particularly interesting, inasmuch as 
it enriches the Fauna of the United States with another 
species of the small subgenus Dacnis , which may be 
ascertained by inspecting the bill. 
The orange-crowned warbler is full five inches long, 
and seven in extent. The bill is dark horn colour, 
slender, straight, entire, and tapering to an acute point ; 
the base of the inferior mandible is whitish beneath ; 
the legs are dusky ; the irides dark brown. The general 
plumage above is dull greenish olive, the rump and tail- 
coverts being bright yellowish olive. The head is very 
slightly and inconspicuously crested ; the feathers of 
