50 



KEY TO FAMILIES. 



A. Middle and outer toes joined for li alt" their length. . . . Fahiily Al- 

 cedinida,: Kinofisiiers (Fig. 35), p. 226. 



B. Two toes in front and two behind. . . . Family CueuUdoi: Cuckoos 

 (Fig. 30;, p. 224. 



FiQ. 37, 



Order XV. Plci.— Woodpeckeus. 



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

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

 less concealed by bristles. . . . Family Picidce: Wooupeckeks (Fig. 37), 

 p. 227. 



FiQ. 38. 



oj^ 



Fio. :i9. 



Fig. 40. 



Order XYI. Macrochires*— Goatsuckers, Swifts, and IlrMMmoniRDs. 

 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 Capriinuhjidoi: 

 NiGHTiiAWKs, Whip-poor-wills, etc. (Fig. 38), p. 236. 

 , B. Size medium ; plumage sooty black ; no comb on the middle toe- 

 nail; tips of the tail-feathers with spines. . . . Ya.im\y Micropodida: 

 Swifts (Fig. 39), p. 239. 

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

 . . . Family Trochilidve: UiMMmoBiRDs (Fig. 40), p. 240. 



