SAY’S FLYCATCHER. 
279 
which agrees so well with the species we are now considering, 
that it might be equally applied to either. Our bird differs 
from the two latter by that striking character, the white ex- 
terior web of the outer tail-feather. From the crinita^ it may 
more especially be known by the spot on the crown, which 
does not exist in that species ; by not having the tail and wing- 
feathers rufous in any part ; and by having the primaries nar- 
rowed at tip, while the crinita has them quite large, entire, 
and rounded. On a particular comparison with the ferox^ we 
shall perceive that the bill of that bird is flattened, broad, and 
carinate, whilst in the verticalis it is almost rounded above. 
The general colour of the latter is, besides, much paler, and 
the tail is less deeply emarginated. 
The Arkansaw flycatcher appears to inhabit all the region 
extending west of the Missouri river. The specimen we have 
been describing is a male, killed in the beginning of July, on 
the river Platte, a few days’ march from the mountains. 
SAY’S FLYCATCHER.— MUSCICAPA SAYA.— Plate II. Fig. 3. 
Philadelphia Museum, No. 6831. 
TYRAI^NULA Swainson * 
Muscicapa Saya, Synop. p. 67. — Tyrannula pallida, Sw, Synop. Mex. Phil, 
Mag. No. 15 Tyrannula Saya, North. Zool. ii. p. 142. 
We now introduce into the Fauna of the United States a 
species which is either a nondescript, or one that has been im- 
cimen is, in the Philadelphian Museum, designated by the fanciful name of 
ruby-crowned flycatcher, (with this Say compared his Tyrannus verticalis be- 
fore he stated it to be new,) and in the Newi York Museum three specimens 
are exhibited with the erroneous title of whiskered flycatcher (^Muscicapa har- 
hata.^ 
One or two specimens of this apparently uncommon bird were procured by 
the overland Arctic expedition, agreeing generally with the birds now described. 
Mr Swainson has received it from Mexico. — Ed. 
