Page:Birds of North and Middle America partV Ridgway.djvu/188

160 very slightly protruded; wing less than four times as long as tarsus; inner webs of remiges with an extensive basal area of ochraceous or pale tawny. Premnornis (extralimital).
 * ee. Wing shorter (less than three and a half times as long as tarsus) and more rounded, the primaries exceeding secondaries by less than length of exposed culmen; bill relatively longer, the exposed culmen as long as middle toe without claw; inner webs of, remiges without buff or ochraceous cross-band or basal area.

Premnoplex (p. 180).
 * dd. Tarsus longer than middle toe with claw; outer toe with second phalanx entirely free from middle toe, the first phalanx also often partly free.
 * e. Basal phalanx of middle toe partly free from outer toe; bill more subulate or terete, with culmen more or less distinctly curved (at least terminally), the mesorhinium more or less rounded or else much compressed; wing relatively shorter and more rounded, the longer primaries exceeding secondaries by less than length of exposed culmen; no tuft on sides of neck; smaller forms (wing less than 80 mm.) (Synallaxeæ.)
 * f. Rectrices 12.
 * g. Tail much shorter than wing; hallux (without claw) longer than outer toe (without claw); wing four times as long as tarsus.

Siptornis (extralimital).
 * gg. Tail longer (sometimes very much longer) than wing; hallux (without claw) not longer than outer toe (without claw); wing not more than three and a half times as long as tarsus (usually much less).
 * h. Tarsus at least one-third as long as wing; frontal feathers extending farther forward, covering most of nasal operculum and concealing greater part of nostril.
 * i. Bill much stouter, with culmen much more strongly curved, more compressed, and sharply ridged; rictus abruptly and strongly deflected.
 * j. Tarsus decidedly more than one-third as long as wing; wing about two-thirds as long as tail; mesorhinium elevated, extremely compressed.

Drioctistes (extralimital).
 * jj. Tarsus not more than one-third as long as wing; wing more than three-fourths as long as tail; mesorhinium not elevated nor unusually compressed.
 * k. Wing only four-fifths as long as tail, the latter graduated for nearly two- thirds its length; tarsus not longer than middle toe with claw; bill relatively longer and narrower; feathers of chest with thickened or widened shafts.

Phaceloscenus (extralimital).