32 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
(?) D{tallactes] granadensis Casants, Journ. fiir Orm., May, 1872, 234 (Bogota, 
Colombia; coll. Berlin Mus.?). 
(2?) Thamnophilus transandeanus granadensis Menzcaux and Heimayr, Bull. 
Soc. Philom. Paris, ser. 9, viii, 1906, 25 (Bogoté and Antioquia, Colombia; 
Mérida, Venezuela; crit.). 
Genus HYPOLOPHUS Cabanis and Heine. 
Hypolophus@ Casants and Herne, Mus. Hein., ii, Aug., 1859, 16. (Type, Turdus 
cirrhatus Gmelin=Lanius canadensis Linnzeus.) 
Medium-sized Formicariide (length about 150 mm.) with 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 antie decidedly less 
than depth at same point (H. melanonotus) or slightly greater than 
depth (H. canadensis), equal to less than half the distance from nostril 
to tip of maxilla (H. melanonotus) or more than half (Z. canadensis); 
culmen moderately (H. canadensis to rather sharply ridged (H. 
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 thickened; feathers of chin, malar antia, 
and frontal antiz 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, slightly (H. 
canadensis) to much (H. 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, 
a “Von dxdbdogoc (subcristatus).’’ (Cabanis and Heine.) 
b These bristly points are much more strongly developed in A. melanonotus than in 
H. cirrhatus, as are also those of the loral region. 
