Page:Birds of North and Middle America partV Ridgway.djvu/46

18 and black or else plain gray, very different from color of upper parts Hypsibemon (extralimital).
 * hh. Bill more slender; tarsus not more than half as long as wing; coloration plain, the pileum and hindneck concolor with the back, etc. (plain olive or rufescent), the under parts concolored (usually tawny or ochraceous)

Oropezus (extralimital).
 * gg. Tail decidedly less than half as long as wing; rictal bristles indistinct

Myrmothera (extralimital).
 * dd. Nasal fossæ longer and narrower (distance from anterior end to base of exposed culmen equal to about two-thirds the distance from same point to tip of maxilla), elliptical or oblong, the nostrils more longitudinal and separated from latero-frontal antiæ by a distinct interval of naked integument; rictal bristles wanting; bill relatively longer and narrower, more terete (depth at frontal antiæ equal to not more than half the distance from nostril to tip of maxilla

Hylopezus (p. 152).

 Genus CYMBILAIMUS Gray.


 * Cymbilaimus, List Gen. Birds, 1840, 36. (Type, Lanius lineatus Leach.)
 * Cymbilanius (emendation), Proc. Zool. Soc. Lond., 1854 (pub. Apr. 5, 1855), 112.
 * Cymbolaemus (emendation) and, Mus. Hein., ii, Aug., 1859, 18, footnote, in text.

Medium-sized Formicariidæ (length about 160 mm.) with short, very stout, and strongly hooked bill, rounded and exposed nostrils, and finely barred plumage.

Bill about as long as head or a little shorter, very stout, strongly hooked, its width at frontal antiæ about equal to its depth at same point and about two-thirds the distance from nostril to tip of maxilla; exposed culmen shorter than tarsus, nearly straight to near the abruptly decurved and strongly uncinate tip of maxilla; maxillary tomium straight for most of its length, distinctly notched or concave subterminally; mandible falcate, recurved terminally; gonys strongly convex, ascending terminally, broadly rounded (not ridged) beneath, decidedly longer than unfeathered portion of mandibular rami; mandibular tomium distinctly toothed and notched subterminally. Nostril exposed, small, rounded or broadly oval, with an internal tubercle showing within upper posterior portion. Rictal bristles obvious but small; feathers of chin and anterior portion of malar region with bristly points or terminal setæ. Wing rather short, 