Page:Birds of North and Middle America partV Ridgway.djvu/53

Rh strongly decurved, the tip of maxilla conspicuously uncinate; maxillary tomium nearly straight, distinctly notched subterminally; tip of mandible slightly recurved or subfalcate, the tomium slightly but distinctly toothed and notched subterminally; gonys strongly convex and prominent basally, ascending and moderately convex terminally, nearly twice as long as unfeathered portion of rami. Nostril small, exposed, obliquely oval, without visible internal tubercle. Rictal bristles obvious but small; feathers of chin and anterior portion of malar region with small bristly tips, those of loral region with much- thickened shafts, and those of frontal antiæ semi-decomposed. Wing moderate, the longest primaries decidedly longer than secondaries, much rounded; fifth, sixth, and seventh primaries longest, the tenth (outermost) about three-fifths as long as the longest, the ninth about as long as secondaries. Tail slightly but decidedly shorter than wing, much rounded (graduation about equal to distance from nostril to tip of maxilla), the rectrices (12) broad, rounded terminally. Tarsus as long as exposed culmen or a little shorter (between one- fourth and one-third as long as wing), distinctly scutellate, the planta consisting of two longitudinal series of scutella, the inner series of which are larger, of quadrate form, and extend around the posterior margin, the outer series much smaller, longitudinal, and irregularly hexagonal or elliptical; middle toe, with claw, much shorter than tarsus; outer toe, without claw, reaching to beyond middle of subterminal phalanx of middle toe, the inner toe decidedly but slightly shorter; hallux about as long as inner toe but much stouter; middle toe united to outer toe by whole of its basal phalanx, to inner toe by more than half its basal phalanx; claws moderately curved, rather blunt, much compressed. Plumage blended, rather lax, especially on rump; feathers of pileum moderately developed, not forming a distinct crest.

Coloration. — Adult male black (more gray or slaty on under parts of body), the wing-coverts with white terminal dots, the lateral rectrices narrowly tipped with white; adult female gray or olive, narrowly streaked with whitish.

Range. — Costa Rica and western Panamá. (Monotypic.)

ABALIUS BRIDGESI (Sclater.)

Adult male. — Head, neck, chest, and upper parts black, broken on wing-coverts by a small spot of white at tip of most of these feathers; outer pair of rectrices with a small terminal spot of white, the next pair sometimes with a similar but smaller spot; under parts of body, posterior to chest, plain slate color, the under tail-coverts similar but darker; under wing-coverts (except along margin of wing)