18 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



and black or else plain gray, very different from color of upper 



parta Hj^psibemon (extralimital).« 



hh. Bill more slender; tarsus not more than half as long as wing; col- 

 oration plain, the pileum and hindneck concolor with the back, 

 etc. (plain olive or rufescent), the under parts concolored 



(usually tawny or ochraceous) Oropezus (cxtralimital).^ 



gg. Tail decidedly less than half as long as wing; rictal bristles indis- 

 tinct Myrmothera (extralimital).^ 



dd. Nasal fossae 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 antise by a distinct interval of naked 

 integument; rictal bristles wanting; bill relatively longer and narrower, 

 more terete (depth at frontal antise equal to not more than half the dis- 

 tance from nostril to tip of maxilla Hylopezus (p. 152). 



Genus CYMBILAIMUS Gray. 



Cymbilaimus Gray, List Gen. Birds, 1840, 36. (Type, Lanius lineatus Leach.) 

 Cymhilanius (emendation) Sclater, Proc. Zool. Soc, Lond., 1854 (pub. Apr. 



5, 1855), 112. 

 Cymbolaemus (emendation) Cabanis and Heine, Mus. Hein., ii, Aug., 1859, 



18, footnote, in text. 



Medium-sized Formicariidse (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 antiai 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 

 sub terminally; 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, smah, 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 setje. Wing rather short, 



a Eypsibemon Cabanis, in Wiegmann's Archiv ftir Naturg., xiii, pt. i, 1847, 217. 

 Type, Grallaria ruficapilla Lafresnaye. (Andes of Colombia, Ecuador, and Peru; 

 several species.) 



This genus includes the first three species of Dr. Sclater's " Grallariaj flammulatse," 

 together with at least Grallaria ruficeps of his section "Grallariae uniformes." 



b Oropeztis Ridgway, Proc. Biol. Soc, Wash., xxii, April 17, 1909, 70. Type, Gral- 

 laria rufula Lafresnaye. (Mountains of Colombia, Ecuador, and Peru ; several species. ) 



c Myrmothera Vieillot, Analyse, 181G, 43. Type, '' Bcfroi [= Formicarius brevicauda 

 Boddaert] et quelques autres fourmilliers de Buffon." (Guiana and lower Amazon 

 Valley,- Venezuela?; two species?) 



