18 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
and black or else plain gray, very different from color of upper 
Parisnwveve vss vec sns Beeueyeoeeess Hypsibemon (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 (extralimital). 
gg. Tail decidedly less than half as long as wing; rictal bristles indis- 
HNC ticcacec cabinet eae eteeeesess Myrmothera (extralimital).¢ 
dd. Nasal fossee 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 antie by a distinct interval of naked 
integument; rictal bristles wanting; bill relatively longer and narrower, 
more terete (depth at frontal antie 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.) 
Cymbilanius (emendation) ScuaterR, Proc. Zool. Soc., Lond., 1854 (pub. Apr. 
5, 1855), 112. 
Cymbolaemus (emendation) CaBpanis and Herne, Mus. Hein., ii, Aug., 1859, 
18, footnote, in text. 
Medium-sized Formicariide (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 antiz 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 sete. Wing rather short, 
« Hypsibemon Cabanis, in Wiegmann’s Archiv fiir 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 “ Grallarise flammula’ 
together with at least Grallaria ruficeps of his section ‘‘Grallariee uniformes.”’ 
b Oropezus Ridgway, Proc. Biol. Soc., Wash., xxii, April 17, 1909, 70. Type, Gral- 
laria rufula Lafresnaye. (Mountains of Colombia, Ecuador, and Peru; several species.) 
¢ Myrmothera Vieillot, Analyse, 1816, 43. Type, ‘ Béfroi [= Formicarius brevicauda 
Boddaert] et quelques autres fourmilliers de Buffon.”’ (Guiana and lower Amazon 
Valley; Venezuela?; two species?) 
