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.pl. 11. 

 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 Burroicing Owl. They all belong to one and the same 

 species, and there will be no need of my proposed conditional 

 name, hypudaa. 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 virginiana. 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 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 melanoptems, 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. 



