12 



INDEX TO KEY. 



PACK 



Group 5. Birds having wings from 6.75 to 9 inches long ... 24 



Section 1. Toes 4, with more or less web ; bill curved upward or 



straight, bill over 2.60 inches long ... 24 

 Section 2. Toes 4, without webs ; bill nearly straight, bill over 



2.60 inches long 25 



SectionB. Toes 4, with small web; bill curved upward or 



straight, bill under 2.60 and over 1.50 inches . 25 

 Section 4. Toes 4, with small web; bill nearly straight, bill 



under 1.50 inches ...... 26 



Section 5. Toes 4, with small web ; bill curved downward, bill 



over 2 inches . . . . . . . 27 



Section 6. Toes 4, without webs : bill under 1.50 ... 27 



Section 7. Toes 3 ......... 27 



Group 6. Birds having wings from 9 to 12 inches long ... 28 



Section 1 . Toes 4 ; bill curved downward .... 28 



Section 2. " 4; ' " upward or nearly straight . . 29 



Section 3. " 3; " nearly straight 21) 



