100 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



rusty or wliitish; interscapulars extensively white basally; under 

 parts plain deep tawny or rufous-tawny to nearly chestnut, the color 

 deepest on chest, palest on abdomen, the flanks tinged with olive; 

 maxilla blackish, becoming more horn colored terminally; mandible 

 horn color, paler (sometimes whitish) terminally; iris brown; legs 

 and feet horn color (bluish gray or grayish blue in life); length 

 (skins), 148-152 (150); wing, 72-76 (73.6); tail, 53.5-57 (55.4); 

 culmen, 19-20.5 (19.7); tarsus, 28-30 (29.2); middle toe, 18-19.5 

 (18.8).« 



Eastern Panama (Loma del Leon; Panama) and adjacent portion 

 of northwestern Colombia (Rio Atrato). 



Myiothera nudiceps Cassin, Proc. Ac. Nat. Sci. Phila., 1850, 106, pi. 6 (Isthmus 



Panamd,; coll. Acad. Nat. Sci. Phila.). 

 Pyriglena nudiceps Sclater, Proc. Zool. Soc. Lond., 1854, 113, part (Isthmus 



Panama); 1857, 47, in text. 

 Gymnoeichla nudiceps Sclater, Proc. Zool. Soc. Lond., 1858, 274 (monogr.); Cat. 



Birds Brit. Mus., xv, 1890, 272, part (Lion Hill; Panama). — Lawrence, Ann. 



Lye. N. Y., vii, 1862, 295 (Lion Hill; Panama). — Sclater and Salvin, Proc. 



Zool. Soc. Lond., 1864, 356 (Lion Hill, crit.; descr. female). — Salvin and 



Godman, Biol. Centr.-Am., Aves, ii, 1892, 223, part (Lion Hill, Panamd). — 



Bangs, Proc. New Engl. Zool. Club, ii, 1900, 24 (Lion Hill, Panama). 

 [Gymnoeichla] nudiceps Sclater and Salvin, Nom. Av. Neotr., 1873, 73, part. — 



Sharpe, Hand-list, iii, 1901, 32, part. 

 G[ymnocichla] nudiceps nudiceps Ridgway, Proc. Biol. Soc. Wash., xxi, 1908, 194, 



in text. 

 Pithys rufigularis (not of Sclater, ex Turdus ruficjula Boddaert). Lawrence, Ann. 



Lye. N. Y., vii, 1862, 293 (Lion Hill, Panama; =adult female). 

 Myrmeciza ferruginea Lawrence, Ann. Lye. Nat. Hist. N. Y., vii, 1862, 470 



(Lion Hill, Panama; = adult female; see Sclater and Salvin, Proc. Zool. 



Soc. Lond., 1864, 356). 

 Myrmelastes corvinus (not Thamnophilus corvinus Gould) Lawrence, Ibis, v, 



April, 1863, 182 (Lion Hill, Panama Railway; coll. G. N. Lawrence); Ann. 



Lye. N. Y., viii, 1863, 485 (Lion Hill). 

 Myrmelastes lawrencii, part, Salvin and Godman, Biol. Centr.-Am., Aves, ii, 



1892, 226, part (Lion Hill, Panama). 



a Six specimens. 



