INTRODUCTION. 15 
Mr. Vigors farther divides these families into five 
sub-families, the falcons (Falconide), for example, 
thus: 
cr 09 0D me 
. Aquilina, Eagles. 
. Asturina, Hawks. 
. Falconina, Falcons. 
. Buteonina, Buzzards. 
. Milvina, Kites. 
