228 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Large Dendrocolaptide (length about 250-275 mm.) with roundish, 
nonoperculate nostril, and nearly straight, depressed bill with dis- 
tance from nostril to tip of maxilla greater than length of tarsus, and 
more than three times its depth at nostril. 
Bill about as long as or slightly longer than head, nearly straight, 
broad and depressed. basally, its width at frontal antiz very slightly 
to much greater than its depth at same point and equal to less than 
one-third the distance from nostril to tip of maxilla; culmen very 
much longer than tarsus, distinctly (sometimes sharply) ridged, 
gradually (usually very slightly) curved to near tip, where abruptly 
decurved, the tip of maxilla distinctly uncinate; maxillary tomium 
nearly straight to slightly but distinctly concave, distinctly notched 
subterminally; mandibular tomium very faintly to rather distinctly 
convex, with faint trace of subterminal notch; gonys practically 
straight for most of its length but convex and slightly prominent 
basally, sometimes slightly decurved terminally. Nostril exposed, 
posteriorly in contact with latero-frontal feathering, roundish or 
broadly oval, nonoperculate. Rictal bristles absent, but feathers of 
chin and lores with loose, semidecomposed, setaceous webs. Wing 
large, pointed, the longest primaries exceeding secondaries by nearly 
to quite the distance from nostril to tip of maxilla; seventh, seventh 
and eighth, or sixth, seventh, and eighth primaries longest, the 
tenth (outermost) two-thirds or more as long as the longest, the 
ninth longer than fourth, sometimes longer than fifth. Tail nearly 
as long as wing, graduated for about the length of culmen, the rec- 
trices (12) conspicuously acuminate, with very strong and extremely 
rigid shafts, which are more or less strongly decurved terminally. 
Tarsus shorter than exposed culmen, a little more than one-fifth 
as long as wing, rather slender, distinctly scutellate (endaspidean) ; 
middle toe, with claw, slightly shorter than tarsus; outer toe (with 
or without claw) as long as middle toe or very slightly longer; inner 
toe (without claw) reaching to a little beyond subterminal articula- 
tion of middle toe, its claw reaching to base of middle claw (D. certhia) 
or falling far short (D. validus); hallux decidedly shorter than inner 
toe, little if any stouter; middle toe united to outer toe by whole of 
basal and part of second phalanx, to inner toe by at least half the 
basal phalanx; claws large, very strongly curved, very acute, that of 
the hallux less strongly curved, longer than the digit. 
Coloration.—Brown or olive, the tail, upper tail-coverts and 
remiges deep cinnamon-rufous or chestnut; pileum streaked, or 
spotted with paler brown or buffy or barred with black; under parts 
paler brown, olive, or brownish buffy more or less distinctly barred 
with darker or blackish, the chest sometimes streaked, the throat 
usually mostly dull whitish or pale brownish buffy. Sexes alike. 
Nidification.—Nesting in holes of trees; eggs white. 
