196 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult (sex not determined).— Length (skin), about 125; wing, 60; 

 tail, 59 (middle rectiices imperfect); exposed ciilmen, 11; tarsus, 18; 

 middle toe, 14." 



Eastern Panama (Nata, Code). 

 Synallaxis albescens hypoleuca Ridgway, Proc. Biol. Soc. Wash., xxii, April 17, 

 1909, 73 (Nata, Code, Panama; coll. U. S. Nat. Mus.). 



Genus PSEUDOCOLAPTES Reichenbach, 



Pseudocolaptes Reichenbach, Uandb. Spec. Orn., 1853, 209. (Type, P. sevii- 

 cinnamomeus 'Reichenbach^ Anabates boissonneautii Lafresnaye.) 



Otipne b Cabanis and Heine, Mus. Hein., ii, Aug., 1859, 30. (Type, Anabates 

 boissonneautii Lafresnaye.) 



Large scansorial Furnariidse (length about 200 mm.) with narrow 

 (slit-like), broadly operculate nostrils, wedge-shaped compressed bill, 

 acummate, 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 antise 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; culm en rather indistinctly ridged anteriorly, the meso- 

 rhinium distinctly flattened, sometimess lightly arched above nostrils, 

 and thence to tip nearly straight or but shghtly 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 antia). Rictal bristles 

 wanting, and feathers of chin, etc., without terminal setse. 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-tliirds as long as the longest, the ninth mtermediate 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 

 subtermmal phalanx of middle toe, the inner toe slightly, but dis- 



a One specimen (the type). 



J> "Von ouc (Ohr) imd 'izvt] (Baumhacker)." (Cabanis and Heine.) 



