144 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
wing, even, slightly double rounded, or slightly emarginate, the 
rectrices (10?) very narrow, rounded or minutely subacuminate ter- 
minally. 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, reach- 
ing 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. é 
Range.—Costa Rica to mountains of British Guiana and Ecuadér. 
(Six species.*) 
KEY TO THE SPECIES OF GRALLARICULA. 
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).6 
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 Ecuadér.) 
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 Panam4.).........-..-.- Grallaricula costaricensis (p. 145). 
@ Of these I have seen only G. flavirostris (Sclater), G. ferrugineipectus (Sclater), 
and G. costaricensis Lawrence. 
b Grallaria ferrugineipectus Sclater, Proc. Zool. Soc. Lond., 1857 (pub. Oct. 21), 
129 (near Car4cas, Venezuela; coll. Paris Mus.); Ann. and Mag. N. H. (2), xx, 1857, 
462 (reprint).—Grallaricula ferruginetpectus Sclater, Proc. Zool. Soc. Lond., 1858, 284 
(monogr.); Cat. Birds Brit. Mus., xv, 1890, 326.—Conopophaga browni Bangs, Proc. 
Biol. Soc. Wash., xiii, Nov. 11, 1899, 100 (Chirua, Santa Marta, Colombia, 7,000 ft.; 
coll. E. A. and O, Bangs). 
¢ Grallaria flavirostris Sclater, Proc. Zool. Soc. Lond., 1858 (pub. Apr. 26), 68 (Rio 
Napo, e. Ecuadér; coll. Verreaux).—Grallaricula flavirostris Sclater, Proc. Zool. Soc. 
Lond., 1858, 283 (monogr.); Cat. Birds Brit, Mus., xv, 1890, 326, 
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