INDEX TO KEY. 



Family FALCONID^. Hawks, Falcons, 

 Eagles, Kites, etc. 



GROUP i. Wing, less than 8.50 inches long. See page 145. 

 GROUP 2. Wing, 8.50 to 9.50 inches long. See page 146. 

 GROUP 3. Wing, 9.50 to 13 inches long. See page 147. 



Section i. Species having second primary longest. See page 147. 

 Section 2. Species having third primary longest. See page 147. 

 Section 3. Species having fourth primary longest. See page 147. 

 GROUP 4. Wing, 13 to 15 inches long. See page 148. 



Section r. Second primary, longest; first and second primaries, emar- 



ginate or notched. See page 148. 



Section 2. Third primary, longest; face, bare. See page 149. 

 Section 3. Fourth primary, longest; upper tail coverts, white. See page 



149. 

 Section 4. Fourth primary, longest; upper tail coverts, not white. See 



page 149. 

 GROUP 5. Wing, 15 to 17 inches long. See page 150. 



Section i. Second primary, longest; only first primary, notched. See 



page 150. 

 Section 2. Second primary, longest; first and second primary, notched. 



See page 151. 



Section 3. Third primary, longest. See page 151. 

 Section 4. Fourth primary, longest; four or five outer primaries, notched; 



upper tail coverts, white. See page 152. 

 Section 5. Fourth primary longest; four or five outer primaries, notched; 



upper tail coverts, not white; tarsus, partly feathered. See page 152. 

 Section 6. Fourth primary, longest; four or five outer primaries, notched; 



tarsus, entirely feathered. See page 152. 

 Section 7. Fourth primary, longest; three outer primaries, notched. See 



page 153. 

 GROUP 6. Wing, 17 to 21 inches long. See page 153. 



Section i. Third primary, longest; tarsus, wholly feathered. See page 



153- 

 Section 2. Third primary longest; tarsus, not wholly feathered. See page 



153- 

 Section 3. Fourth primary, longest; tarsus, partly feathered. See page 



154. 

 Section 4. Fourth primary, longest; tarsus, entirely feathered. See page 



154. 

 GROUP 7. Wing, over 21 inches long. See page 155. 



143 



