Page:Birds of North and Middle America partV Ridgway.djvu/172

144 wing, even, slightly double rounded, or slightly emarginate, the rectrices (10 ?) very narrow, rounded or minutely subacuminate terminally. Tarsus much longer than commissure, about one-third as long as wing, slender, distinctly scutellate, the plantar scutella in a single longitudinal series, bending around to the inner side, where separated from the inner edge of the acrotarsium by a rather broad shallow groove; middle toe, with claw, much shorter than tarsus, decidedly shorter than commissure; outer toe, without claw, reaching very nearly to middle of subterminal phalanx of middle toe, the inner toe very slightly shorter; hallux about as long as inner toe but much stouter; basal phalanx of middle toe united for more than half its length to outer toe, for about half its length to inner toe; claws moderate in size and curvature, that of the hallux shorter than the digit, acute, much compressed. Plumage full, soft, and (mostly) blended, that of rump and flanks more elongated and fluffy or lax; feathers of pileum slightly elongated, distinctly outlined.

Coloration. — (I) Above plain brown or olive; beneath white, or white and ochraceous, tawny, or rufescent, usually more or less streaked or squamated with black or dusky. (II) Head (all round) chestnut; rest of plumage plain brownish gray above, lighter and clearer gray beneath, with patch of white on lower abdomen and foreneck.

Range. — Costa Rica to mountains of British Guiana and Ecuadór. (Six species. )

a. Under parts without streaks or other markings (tawny or tawny-ochraceous, the throat and abdomen sometimes white or whitish). (Santa Marta district of Colombia to Venezuela.) Grallaricula ferrugineipectus (extralimital). aa. Under parts more or less streaked or spotted with blackish or dusky.
 * b. Paler olive-brown above; under parts with less of ochraceous and with black streaks or squamations much heavier. (Colombia to eastern Ecuadór.)

Grallaricula flavirostris (extralimital).
 * bb. Darker olive-brown above; under parts with more ochraceous or ochraceous-tawny (mostly so) with blackish streaks or squamations indistinct. (Costa Rica and western Panamá.)

Grallaricula costaricensis (p. 145).