Page:Birds of North and Middle America partV Ridgway.djvu/192

164 reaching to beyond middle of subterminal phalanx of middle toe, the inner toe conspicuously shorter, reaching (without claw) only to subterminal articulation of middle toe; hallux longer than inner but shorter than outer toe; claws moderate in size and curvature to rather large and strongly curved, much compressed, that of the hallux shorter than the digit.

Coloration. — Plain brownish, the rump and upper tail-coverts usually more rufescent, sometimes bright or deep chestnut; under parts paler than upper, the throat sometimes gray or whitish or squamated. Sexes alike.

Nidification. — Nest (of S. umbretta) composed of leaf-ribs placed in a rounded chamber at the end of a gallery in the ground. Eggs white.

Range. — Southern Mexico to Cayenne, Argentina, and Peru. (About twelve species.)

a. Lower rump and upper tail-coverts chestnut, distinctly different from color of back.
 * b. Chin and throat whitish or grayish, distinctly different from color of chest.
 * c. Chin and throat dull white or grayish white, the feathers margined or tipped with dusky. (Southern Brazil.)

Sclerurus umbretta (extralimital).
 * cc. Chin dull white deepening into gray on throat, the feathers without distinct, if any, darker margin or tip.
 * d. Back, etc., brown; chest tawny brown or dull rusty. (Sclerurus albigularis.)
 * e. Back, etc., olive-brown; chest tawny brown; throat grayish white, deepening into pale gray on lower portion. (Venezuela; Tobago.)

Sclerurus albigularis albigularis (extralimital).
 * ee. Back, etc., burnt-umber brown; chest dull rusty; throat smoke gray. (Northeastern Colombia.)

Sclerurus albigularis propinquus (extralimital).