Page:Birds of North and Middle America partV Ridgway.djvu/83

Rh ::::: ff. Darker and duller slate color above, less extensively white beneath, the flanks darker and more bluffy brownish. (British Guiana.) Dysithamnus mentalis spodionotus, adult male (extralimital).
 * bb. Pileum and hindneck streaked or spotted with black (sometimes also spotted with white).
 * c. Pileum with small rounded spots of white; throat and foreneck more narrowly streaked; tail 34-38. (Costa Rica and western Panamá.)

Dysithamnus puncticeps, adult male (p. 58).
 * c. Pileum without white spots; throat and foreneck more broadly streaked; tail 30-35. (Costa Rica.)

Dysithamnus striaticeps, adult male (p. 59). aa. Pileum and hindneck rufescent brown, cinnamomeous, or tawny, very different from olive or olive-brown of back.
 * b. Pileum, throat, and chest without streaks; wing-coverts much less distinctly tipped with buff.
 * c. Under parts strongly buffy, the abdomen white or pale buffy (never yellow); pileum and hindneck more strongly and more extensively rufescent, the back, etc., lighter and more buffy olive.

Dysithamnus affinis, adult female (extralimital).
 * cc. Under parts olivaceous (not buffy) laterally and on chest, the abdomen pale yellowish or whitish. (Dysithamnus mentalis.)
 * d. Sides and chest much darker olivaceous.

Dysithamnus mentalis semicinereus, adult female (extralimital).
 * dd. Sides and chest much paler olivaceous.
 * e. Abdomen pale olive-yellowish.

Dysithamnus mentalis septentrionalis, adult female (p. 56).
 * ee. Abdomen white

Dysithamnus mentalis andrei, adult female (extralimital).
 * bb. Pileum, throat, and chest streaked with dusky; wing-coverts much more distinctly tipped with buffy.
 * c. Tail 36.5-40; under parts more strongly buffy, with chest, etc., more narrowly streaked; pileum paler tawny or cinnamomeous, more distinctly streaked with dusky

Dysithamnus puncticeps, adult female (p. 58).
 * cc. Tail 29-35.5; under parts less strongly buffy (whitish medially), with chest more heavily streaked ; pileum darker tawny, less distinctly streaked with dusky

Dysithamnus striaticeps, adult female (p. 60).

DYSITHAMNUS MENTALIS SEPTENTRIONALIS Ridgway.

Similar to D. m. semicinereus but decidedly smaller; adult male lighter in color of upper parts, adult female with sides and flanks paler olive.