196 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult (sex not determined).—Length (skin), about 125; wing, 60; 
tail, 59 (middle rectrices imperfect) ; exposed culmen, 11; tarsus, 18; 
middle toe, 14.2 
Eastern Panama (Nata, Coclé). 
Synallaxis albescens hypoleuca Ripeway, Proc. Biol. Soc. Wash., xxii, April 17, 
1909, 73 (Nata, Coclé, Panam4; coll. U. 8. Nat. Mus.). 
Genus PSEUDOCOLAPTES Reichenbach. 
Pseudocolaptes ReicHenBacH, Handb. Spec. Orn., 1853, 209. (Type, P. semi- 
cinnamomeus Reichenbach= Anabates boissonneautit Lafresnaye.) 
Otipne > CaBanis and Herne, Mus. Hein., ii, Aug., 1859, 30. (Type, Anabates 
boissonneautit Lafresnaye.) ; 
Large scansorial Furnariide (length about 200 mm.) with narrow 
(slit-like), broadly operculate nostrils, wedge-shaped compressed bill, 
acuminate, rigid-shafted rectrices, and with a tuft of elongated soft 
(white or buff) feathers on each side of neck. 
Bill decidedly shorter to longer than head, nearly elongate-cuneate 
in lateral profile, much compressed, its width at loral antiz decidedly 
less than its depth at same point and equal to less than one-third 
the distance from nostril to tip of maxilla, the latter scarcely if at all 
decurved; culmen rather indistinctly ridged anteriorly, the meso- 
rhinium distinctly flattened, sometimess lightly arched above nostrils, 
and thence to tip nearly straight or but slightly decurved; maxillary 
tomium strongly deflected basally, the anterior half straight or very 
faintly concave, without trace of subterminal notch; the mandibular 
tomium also straight (or very nearly.so) and without trace of notch; 
gonys straight, slightly ascending terminally, the mandibular rami 
sometimes strongly deflected basally. Nostril exposed, posteriorly 
in contact with latero-frontal feathering, very narrow (slit-like), 
broadly operculate, the posterior portion of the operculum invaded 
by the short feathering of the latero-frontal anti. Rictal bristles 
wanting, and feathers of chin, etc., without terminal sete. Wing 
large and pointed, with the longest primaries exceeding secondaries 
by more than length of bill from nostril; sixth, seventh, and eighth 
primaries longest and nearly equal, the tenth (outermost) more than 
two-thirds as long as the longest, the ninth intermediate between 
fourth and fifth. Tail about six-sevenths as long as wing, graduated 
for about one-fourth its length (graduation much less than length of 
tarsus), the rectrices (12) broad, acuminate, with rigid but slender 
shafts. Tarsus about one-fourth as long as wing, stout, distinctly 
scutellate (endaspidean); middle toe, with claw, decidedly shorter 
than tarsus; outer toe, without claw, reaching to beyond middle of 
subterminal phalanx of middle toe, the inner toe slightly, but dis- 
a One specimen (the type). 
6 “Von od¢ (Ohr) und éxvy (Baumhacker).”” (Cabanis and Heine.) 
