62 BRITISH BIRDS. 
Genus ELANOIDES. 
The genus Elanoides was established by Vieillot in 1818, in his ‘ Nouveau 
Dictionnaire d’Histoire Naturelle,’ xxiv. p. 101, when he removed the 
Swallow-tailed Kite from the genus Milvus in which he had first placed it. 
The latter genus was separated from the genus Falco (in which Linnzus 
included the Swallow-tailed Kite) by Cuvier in 1800. The only species 
then known to Vieillot was E. furcatus, which must therefore be the type. 
This genus contains only one species, which is confined to the American 
continent, and only accidentally strays as far as Europe. It has no very 
near relations, but is distantly allied to the genus Nauclerus. It may 
always be distinguished by its long narrow wings and the deep fork in the 
tail, which resembles that of the Barn-Swallow. 
