BIRDS OF NORTH AND MIDDLE AMERICA. 25 
strongly decurved, the tip of maxilla conspicuously uncinate; maxil- 
lary 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 antiz 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 sub- 
terminal 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 Panam4. (Monotypic.) 
ABALIUS BRIDGESI (Sclater.) 
BRIDGES’ ANTSHRIKE. 
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) 
@ Very rarely there are a few very narrow streaks of white on the chest. 
