435 
16. Falco dispar, Temm. Bluish-gray, beneath while ; wing- 
coverts black ; tail even, outer feather shortest. 
White-tailed Hawk , Falco dispar, Nob . Am. Orn . ii. pi. ll« 
Jig. 2 adult female. Milan a queue irreguliere , F. dispar , 
Temm. pi. col. young. 
Inhabits the southern states, Mexico, and South America.* 
Note 3. Strix cunicularia. We may now dismiss any doubt 
as to the identity of the North and South American, as well as the 
West Indian Burrowing Owl. They all belong to one and the same 
species, and there will be no need of my proposed conditional 
name, hypudcea. So different from our bird is Temminck’s plate 
of his Strix grallaria , that when he stated his bird to be the S. cu- 
nicularia of the systems, that I had almost taken it for granted, that 
my name was to be adopted. The difference, however, is owing 
to the inaccuracy of the French plate, for I have identified the spe- 
cimens. This owl is well described by d’Azzara, who gives an ex- 
cellent account of its habits. 
Note 4. Strix Virginian a. Cuvier errs in arranging this bird 
in his subgenus Otus , of which the auricular conch is semicircularly 
extended from the bill to the top of the head, and furnished with a 
large membranous operculum. In the character of the ear, the 
S. virginiana corresponds with S. bubo of Europe, and this learned 
naturalist ought, therefore, to have referred our species to his sub- 
genus j Bubo. In these two closely allied species, we begin to ob- 
serve the enlarged opening of the ears, so conspicuous in the fol- 
lowing subgenus, Ulula. They are perfectly intermediate between 
our two subgenera Surnia and Ulula , and with the Syrnia of 
Savigny, might indeed form a separate subgenus. 
Since writing the above, having ascertained the existence in this 
* Falco melanopterus , Dand. Bluish-gray, beneath white, wing-coverts 
black ; tail even, outer feather longest. 
Black-winged Hawk , Lath. Le Blac , Le Vaill. Ois. d'Afrique , adult 
and young. 
Inhabits the whole continent of Africa, widely spread in the hot climates 
of Asia, found in Java, New Holland, &c. 
