KEY TO FAMILIES 127 
A. Middle and outer toes joined for half their length (Fig. 52)... . 
Family Alcedinide: KinarisHErs, p. 320. 
B. Two toes in front and two behind (Fig. 53)... . Family Cucul- 
ide: CucKkoos, p. 318. 
Fia. 54. 
Order XV. Pici.—WoopPEcKERs. 
Climbing birds with stout, pointed bills, bristly nostrils, pointed, 
stiffened tail-feathers; strong feet and nails; toes four, two in front, 
two behind, or three, two in front, one behind (Fig. 54). Prevailing 
colors black and white, the male usually with red on the head. 
aig those of the Order. . . . Family Picide: WoopreckErs, 
p. : 
Fia. 55, Tia. 57. 
Order XVI. Machrochires.—Goatsuckers, Swirts, and HUMMINGBIRDS. 
An obsolete group to which, for the present, the A. O. U. continues 
to refer our American Goatsuckers, Swifts, and Hummingbirds with 
more obvious external characters as below. 
A. Size comparatively large, plumage soft, variegated: black, brown, 
and buff; middle-toe with a comblike edge (Fig. 55). 
Family Caprimulgide: NIGHTHAWKS, WHIP-POOR-WILLS, ete., 
p. 331. 
B. Size medium, plumage close, ae uae black; tips of tail- 
feathers with spines (Fig. 56). . Family Micropodide: 
Swirts, p. 334. 
C. Size very small, upperparts shining green; bill long and slender 
(Fig. 57)... . Family Trochilide: Humminesirps, p. 335 
