28 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
tomium nearly straight, conspicuously notched subterminally; 
gonys moderately convex, strongly ascending terminally, prominent 
basally; mandibular tomium straight or slightly concave toward 
tip, slightly notched subterminally; width of bill at frontal anti 
about three-fourths its depth at same point. Nostril exposed, 
broadly longitudinally oval, with distinct internal tubercle. Rictal 
bristles obvious but small, the loral feathers with thickened bristly 
shafts. Wing moderate or rather short, excessively rounded, with 
longest primaries very little if any longer than secondaries; second, 
third, and fourth, or third, fourth, and fifth primaries longest and 
equal, tenth (outermost) about three-fifths as long as longest, the 
ninth very much, eighth slightly, shorter than secondaries. Tail 
three-fourths to more than five-sixths as long as wing, much rounded 
(graduation about equal to distance from nostril to tip of maxilla), 
the rectrices (12) rather broad, rounded terminally. Tarsus more 
than one-third as long as wing, distinctly scutellate, the elongate- 
quadrate plantar scutella in two longitudinal series; middle toe, with 
claw, decidedly shorter than tarsus; outer toe, without ckaw, reach- 
ing to or slightly beyond middle of subterminal phalanx of middle 
toe, the inner toe slightly but decidedly shorter; hallux about as 
long as inner toe but much stouter; basal phalanx of middle toe 
united for most of its length to outer toe, for about half its length to 
inner toe; claws moderately developed, that of the hallux decidedly 
shorter than the digit. Plumage blended, very full, that of rump 
much developed and lax; pileum with a conspicuous decumbent 
crest of distinctly outlined, rather narrow feathers. 
Coloration —Under parts (except, sometimes, thighs and under 
tail-coverts), including malar region, immaculate white; upper parts 
black in adult males, rufous-brown or chestnut in adult females, the 
wing-coverts tipped with white (primaries sometimes edged with 
white), the tail sometimes transversely spotted with white.* 
Range.—Southern Mexico to Argentina. (About four species and 
subspecies.) 
TARABA TRANSANDEANA TRANSANDEANA (Sclater). 
HOLLAND'S ANTSHRIKE. 
Adult male—Entire upper parts, including sides of head (down 
to upper margin of malar region) and sides of neck, black, relieved 
by conspicuous white tips to all the wing-coverts® and white edges 
to alula, the terminal portion of remiges duller blackish or more 
@Thamnophilus rohdei Berlepsch, of Paraguay, referred to this group by Dr. Sclater, 
has the under parts black in the adult male with the breast varied with white. This 
species I have not seen and therefore do not know whether it is really 2 member of 
this genus or not. : 
b Sometimes a few of the primaries are narrowly edged with white. 
