muscicapa verticalis. 
emarginated ; the exterior feather is white on the o 1 - 1 ' 1 : 
web, the shaft being white on the exterior half, 9,1 
brown on the interior. , 
Say tirst described and named this bird in the sec 0 , 
volume of the work above quoted, and he remarks 
it is allied to the Tyr annus griseus and Tyrant 
sulphur atus of Vieiilot. There are many species j! 
w'hich the Arkansaw flycatcher might more read'] 
be mistaken; of these we may mention the cresd c 
flycatcher ( Muscicapa crinitd) so well described £ 
Wilson in his second volume ; and particularly | 
Muscicapa ferox* of Gmeliu, a South American 1>>!* 
the description of which agrees so well with the spe<;'*! 
we are now considering that it might be equally appl* , 
to either. Our bird differs from the two latter by t ^‘ l . 
striking character, the w'hite exterior web of the ouq, 
tail-feather. From the Crinita it may more especial 
be known by the spot on the crown, which does t* 1 * 
exist in that species ; by not having the tail and w'i'J? 
feathers rufous in any part ; and by having the prim®'* 1 
narrowed at tip, while the Crinita has them quite la'ft 
entire, and rounded. On a particular comparison "'V, 
the Ferox, we shall perceive that the bill of that bit 1 * !j 
flattened, broad, and carinate, whilst in the Vertical t 4 ’ 1 
is almost rounded above. The general colour of d*‘ 
latter is, besides, much paler, and the tail is less deep 1 '* 
emarginated. 
The Arkansaw flycatcher appears to inhabit all & 
region extending west of the Missouri river. ^ 
specimen we have been describing is a male killed >'! 
the beginning of July, on the river Platte, a few d*f 
march from the mountains. 
Th s J?l r i had been incorrectly considered by Vieiilot i« 
Natural History of North American Birds, as identical with. d*. 
Muscicapa crinita , but, afterwards perceiving it to be a dish*?, 
species, be named it Tyrannus ferox. A specimen is, in 
Philadelphia Museum, designated by the fanciful name of 
crowned flycatcher, (with this S*ay compared his Tura" n \ 
verticalis before lie stated it to be new,) and in the New V° l J 
Museum three specimens are exhibited with the erroneous titl e 
whiskered flycatcher ( Muscicapa barbata . ) 
