138 GAME-BIRDS OP INDIA 



Key to Genera. 



A. No ruff ; sexes differing in size or in breeding plumage. 



a. Top of head black. 



a . Wing over 20 inches Eupodotis. 



b'. Wing under 16 inches Sypheotis S . 



b. Top of head not black. 



a". Tarsus more than one-third length of wing . . . Sypheotis ? , 

 b" . Tarsus one-fourth length of wing Otis. 



B. A ruff' on either side of neck ; sexes alike Houbara. 



