152 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Southwestern Mexico, in States of Jalisco (San Sebastian), Morelos 

 (mountains) and Guerrero (Omilteme) ; Mexico (Valley of Mexico; 

 Chimalpa; Ajusco) ? 



(?) Grallaria mexicana (not of Sclater, 1861?) Sclater, Proc. Zool. Soc. Lond., 

 1864, 175 (Valley of Mexico); Cat. Birds Brit. Mus., xv, 1890, 313, part 

 (western Mexico). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 

 241, part (Valley of Mexico, Chimalpa, and Ajusco, Mexico). 



Grallaria mexicana Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 241, 

 part (Omilteme, Guerrero). 



Grallaria ochraceiventris Nelson, Proc. Biol. Soc. Wash., xii. Mar. 24, 1898, 62 

 (San Sebastian, Jalisco; coll. U. S. Nat. Mus.). 



[Grallaria] ochraceiventris Sharpe, Hand-list, iii, 1901, 41. 



Genus HYLOPEZUS Ridgway. 



Hylopezusa Ridgway, Proc. Biol. Soc. Wash., xxii, Apr. 17, 1909, 71. (Type, 

 Grallaria perspicillata Lawrence.) 



Medium-sized terrestrial Formicariidre (length about 120-125 

 mm.) witli very long, slender, booted (nonscutellate) tarsi (more 

 than two-fifths as long as wing), very short tail (one- third to about 

 two-fifths as long as wing), slender bill, no rictal bristles, and under 

 parts partly white, with chest more or less streaked with black. 



Bill shorter than head, slender, rather broad and depressed basally, 

 its width at loral antise greater than its depth at same point and 

 equal to half or more the distance from nostril to tip of maxilla; 

 culmen distinctly but not sharply ridged, straight basally, then 

 gradually decurved, the tip of maxilla slightly uncinate; tomia 

 nearly straight, that of maxilla distinctly notched subterminally, 

 the mandibular notch very indistinct or obsolete; gonys convex and 

 prominent basally, nearly straight and ascending terminally. Nostril 

 exposed, horizontally oval, posteriorly nearly in contact with loral 

 feathering, margined above by a narrow extension of the membra- 

 nous integument of the nasal fossae, an internal tubercle or septum 

 showing within the upper posterior portion. Rictal bristles obsolete^ 

 but feathers of malar and loral regions \\dth bristly shafts. Wing 

 moderate, with longest primaries projecting decidedly beyond sec- 

 ondaries; sixth and seventh, fifth, sixth, and seventh, or fifth and 

 sixth, primaries longest, the tenth (outermost) a little less than 

 three-fifths to sliglitly more than two-thirds as long as the longest, 

 the ninth much shorter than secondaries (H. dives)^ or longer than 

 secondaries (other species). Tail one-third {H. perspicillatus) to 

 about two-fifths (//. macularius) as long as wing, very slightly 

 rounded, the rectrices (12) rather broad, rounded terminally. Tarsus 

 slightly more than two-fifths to nearly half as long as wing, slender, 



u"YXt}, a wood, forest; ize^bg, walking. 



b In //. dives even the eighth primary (third from outside) is much shorter than 

 the secondaries. 



