50 



KEY TO FAMILIES. 



A. Middle and outer toes joined for half their length. . . . Family Al- 



eedinidw : Kingfishers (Fig. 35), p. 226. 

 jj. Two toes in front and two behind. . . . Family OumKdce : Cuckoos 



(Fig. 36), p. 224. 



Fig. 37. 



Order XV. Fici. — Woodpeokehs. 



Toes four, two in front and two behind, or toes three, two in front and 

 one behind ; bill strong ; tail-feathers stiff and pointed ; nostrils more or 

 less concealed by bristles. . . . Family Piddis: Woodpeckees (Fig. 3T), 

 p. 227. 



/ ^ 



Fio. sa. 



FiQ. 40. 



Order XVli Macrochires* — Goatsuckers, Swifts, and Hummingbirds. 

 Feet very small and weak ; bill short and small and mouth large, or bill 

 long and exceedingly slender and mouth small ; wings generally long and 

 pointed. 

 A. Size comparatively large; plumage variegated, black and brown; 

 middle toe-nail with a comblike edge. . . . Family Caprimulgidm: 

 NiGHTHAWKS, WlIIP-POOB-WILLS, ctc. (Fig. 38), p. 236. 

 K Size medium ; plumage sooty black ; no comb on the middle toe- 

 nail ; tips of the tail-feathers with spines. . . . Family Micropodidce : 

 Swifts (Fig. 39), p. 239. 

 C. Size very small ; upper parts shining green ; bill long and slender. 

 . . . Family TrocMHdw : Hummin gbirds (Fig. 40), p. 240. 



