INDEX TO KEY TO FAMILIES. 



LAND BIRDS. 



PAGE 



Group I. Birds having wings less than 1.75 inches long 133 



Group 2. Birds having wings from 1.75 to 2.75 inches long . 133 



Section 1. First primary less than half as long as third . . 133 



Part 1. Tip of upper maudible with small but 



distinct hoolv or notch . . . 133 



Part 2. Upper mandible without notch or hook 



at tip 134 



Section 2. First primar}' more than half as long as third . 135 



Part 1. Tip of upper mandible with small but 



distinct hook or notch . . . 135 



Part 2. Tip of upper mandible not notched <n- 



hooked 135 



Group 3. Birds having wings measuring from 2.75 to 3.25 inches 



long ........... 136 



Section 1. First primar}^ less than half as long as third . 136 



Part 1. A small but distinct hook or notch at tip 



of upper mandible . . . .136 



Part 2. Tip of upper mandilile not notched or 



hooked . . . . • .137 



Section 2. First primary not short, always more tlian half as 



long as third . . . . . • .137 



Part 1 . Tip of upper mandible with small but 



distinct hook or notch . . .137 



Part 2. Tip of upper mandible not notched or 



hooked ...... 138 



(131) 



