KEY TO THE HIGHER GROUPS. 



#. Toes only 2 in front, or if 3, the 

 middle and outer toes con- 

 nected for at least half their 

 length. 



Z 1 . Tail-feathers stiff and more or 

 less pointed, and bill more 

 or less chisel-like. 



Order Pici. (Page 280.) 

 Z 2 . Tail-feathers neither stiff nor 

 pointed, and bill not chisel- 

 like. 



Order Coccyges. (Page 271.) 



k*. Toes 3 in front, 1 behind, the middle 



and outer toes not united for 



half their length, lower part of 



thighs feathered, and tarsus equal 



to or longer than lateral toes. 



Order Passeres. (Page 321.) 



