32 BULIiETIN 50, UNITED STATES NATIONAL MUSEUM. 



(?) D[iallactes] granadensis Cabanis, Journ. fiir Orn., May, 1872, 234 (Bogotd, 



Colombia; coll. Berlin Mus.?). 

 (?) Thamnophilus transandeanus granadensis Menegaux and Hellmayr, Bull. 



Soc. Philom. Paris, ser. 9, viii, 1906, 25 (Bogota and Antioquia, Colombia; 



Merida, Venezuela; crit.). 



Genus HYPOLOPHUS Cabanis and Heine. 



Hypolophusa Cabanis and Heine, Mus. Hein., ii, Aug., 1859, 16. (Type, Turdus 

 cirrhatus Gmelin=Z(anms canadensis Linnaeus.) 



Medium-sized Formicariidae (length about 150 mm.) \\dth strong, 

 compressed, and conspicuously-hooked bill, crested pileum, tail four- 

 fifths as long as wing, and exposed culmen longer than middle toe 

 with claw; adult males with head, neck, chest, and median portion of 

 breast and abdomen uniform black, sides and flanks white or light 

 gray, wings and tail black varied with white ; adult females brownish 

 above (the wings varied with buff or whitish, pileum blackish or 

 rufescent), the under parts plain buffy. 



Bill nearly as long as head (exposed culmen longer than middle toe 

 with claw), stout, slightly to much compressed, the maxilla conspicu- 

 ously hooked and notched; width at frontal antiae decidedly less 

 than depth at same point (//. m.elanonotus) or slightly greater than 

 depth {H. canadensis), equal to less than half the distance from nostril 

 to tip of maxilla (//. melanonotus) or more than half {II. canadensis); 

 culmen moderately {II. canadensis to rather sharply ridged {R. 

 melanonotus), nearly straight or very slightly convex for most of its 

 length, strongly and rather abruptly decurved terminally, the tip of 

 maxilla conspicuously uncinate; maxillary tomium nearly straight, 

 distinctly notched and slightly toothed subterminally; mandible 

 recurved and acute at tip, the tomium distinctly notched and toothed 

 subterminally; gonys moderately convex, ascending terminally rather 

 prominent basally. Nostril exposed, roundish or broadly oval, with 

 an interior tubercle partly visible in upper posterior portion. Rictal 

 bristles indistinct or obsolete, but loral feathers sometimes with 

 shafts slightly elongated and tliickened ; feathers of cliin, malar antiae, 

 and frontal antiae with more or less distinct bristly tips.'' Wing 

 moderate in length, rather pointed (primaries decidedly longer than 

 secondaries) ; sixth and seventh primaries longest, tenth (outermost) 

 more than three-fifths as long as the longest, ninth about equal to 

 secondaries. Tail about four-fifths as long as wing, sUghtly {H. 

 canadensis) to much {II. melanonotus) rounded, the rectrices (12) 

 moderately broad, with rounded tip. Tarsus decidedly longer than 

 exposed culmen, about one-third as long as wing, distinctly scutellate, 

 the plantar scutella in two longitudinal series; middle toe, with claw, 



o "Von unbXo(f)o^ (subcristatus)." (Cabanis and Heine.) 



6 These bristly points are much more strongly developed in H. melanonotus ihsm in 

 H. cirrhatus, as are also those of the loral region. 



