WHITE-TAILED HAWK. 
FJ1LC0 DISPAR. 
Plate XI. Fig. 1. 
Falco dispar, Temm. et Latjg. PI. col. 319, young Female. Nob. App. to Synopsis of 
N. A. birds in Ann. Lyc. New-York, p. 435. 
Milvus, {now Elanoides ) leucurus, Yieile. (Alcon bianco, d'Azara ) Nouv. Did. d'Hist- 
Nat. XX, p. 556. 
Falco melanopterus, Nob. Jour. Ac. Ph. V, p. 28. Id. Cat. birds U. S. Sp. 16, in Contr. 
Macl. Lyc. I, p. 11. Id. Synopsis of N A. birds, Sp. 16, in Ann. Lyc. N. V 
Lc Faucon blanc, Sonnini's d'Azara, III, p. 96, Sp. 36. 
My Collection. 
This beautiful Hawk, which we recently discovered to be an 
inhabitant of North America, is so strikingly similar to the Black¬ 
winged Hawk (Falco melanopterus*) of the old continent, that we 
have hitherto considered them as identical, contrary to the opinion 
* Falco melanopterus, Baud. Orn, 2, p. 152, Sp. 124. Lath. Ind. Suppl. p. VI, Sp. 16. 
Falco sonninensis, Lath. Ind. Suppl. p. XII, Sp. 38. 
Elanus csesius, Savigny, Ois. d’Egyp. p. 98, pi. II, f. 2. Vieill. Nouv. Diet. d’Hist. 
Nat. VIII, p. 240. (now Elanoides.) 
Elanus melanopterus, Leach Zool. Misc. Ill, p. 4, pi. 122. Vigors Descr. Austral, 
birds in Tr. Lin. Soc. XV, p. 185. 
Le Blue, Le Vaillant, Ois. d’Afr. I, p. 147, pi. 36, Male, 37, young Male. 
Black-winged Falcon, Lath. Syn. Suppl. II, p. 28, Sp. 23. 
Sonnini's Falcon, Lath. Syn. Suppl. II, p. 52, Sp. 59. 
The inspection of original drawings, in a collection that Mr. Gray, of the British 
Museum, was kind enough to show me lately in London, has enabled me to add to 
these already numerous synonyms, Falco axillaris , Lath. Ind. Suppl. {Circus axillaris, 
Vieill.!) from New-Holland. 
