Page:Birds of North and Middle America partV Ridgway.djvu/189

Rh :::::::::: kk. Wing very nearly as long as tail (more than eight-ninths as long), the latter graduated for only half its length; tarsus longer than middle toe with claw; bill relatively shorter and deeper; feathers of chest without thickened or widened shafts. Phacellodomus (extralimital).
 * ii. Bill much more slender, with culmen much less strongly curved (usually nearly straight), less compressed, less sharply ridged; rictus not deflected.

Asthenes (extralimital).
 * hh. Tarsus much less than one-third as long as wing; frontal feathers not extending so far forward, the nostrils and nasal operculum being uncovered for much the greater part.
 * i. Larger (wing more than 70 mm., exposed culmen more than 15 mm.); conspicuously streaked both above and below.

'Thripophaga (extralimital).
 * ii. Smaller (wing less than 70 mm., exposed culmen less than 15 mm.); without streaks (except sometimes, on pileum.)

Acrorchilus (p. 183).
 * ff. Rectrices 10.
 * g. Tail not more than one and a half times as long as wing (usually much less, sometimes shorter than wing); upper parts not streaked.

Synallaxis (p. 186).
 * gg. Tail nearly twice as long as wing; upper parts streaked.

Schœniophylax (extralimital).
 * ee. Basal phalanx of middle toe wholly united to outer toe; bill more wedge-shaped, with culmen nearly straight (if curved more so toward base than terminally), the mesorhinium flattened; wing relatively longer

81255° — Bull. 50—11——11