INDEX TO KEY, 



Group 1. Birds having wings from 5 to 6.50 inches long 



Section 1. Hind toe, without flap or 

 lobe .... 



Section 2. Hind toe, with well-defined 

 flap or lobe . 



Part 1 . Tail feathers not stiff and 

 pointed 



Part 2. Tail feathers stiff and 



pointed ... .... 



Group 2. Birds having wings from 6.50 to 7.50 inches long 



3 Section 1. Bill, narrow, with tooth-like serrations 



Section 2. Bill, not narrow ; hind toe, without lobe or flap, 



Section 3. Hind toe, with well-defined lobe or flap ; belly, white . 



Section 4. Hind toe, with well-deflned lobe or flap : belly, not 



white ......•■• 



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