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BULLETIN 50, UNITED STATES NATIONAL MUSEUM.
rusty or whitish; 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).[1]
Eastern Panamá (Loma del León; Panamá) and adjacent portion of northwestern Colombia (Rio Atrato).
- Myioihera nudiceps Cassin, Proc. Ac. Nat. Sci. Phila., 1850, 106, pl. 6 (Isthmus Panamá; coll. Acad. Nat. Sci. Phila.).
- Pyriglena nudiceps Sclater, Proc. Zool. Soc. Lond., 1854, 113, part (Isthmus Panamá); 1857, 47, in text.
- Gymnocichla nudiceps Sclater, Proc. Zool. Soc. Lond., 1858, 274 (monogr.); Cat. Birds Brit. Mus., xv, 1890, 272, part (Lion Hill; Panamá). — Lawrence, Ann. Lyc. N. Y., vii, 1862, 295 (Lion Hill; Panamá). — 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, Panamá). — Bangs, Proc. New Engl. Zool. Club, ii, 1900, 24 (Lion Hill, Panamá).
- [Gymnocichla] 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 rufigula Boddaert) Lawrence, Ann. Lyc. N. Y., vii, 1862, 293 (Lion Hill, Panamá; = adult female).
- Myrmeciza ferruginea Lawrence, Ann. Lyc. Nat. Hist. N. Y., vii, 1862, 470 (Lion Hill, Panamá; = 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, Panamá Railway; coll. G. N. Lawrence); Ann. Lyc. N. Y., viii, 1863, 485 (Lion Hill).
- Myrmelastes lawrencii, part, Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 226, part (Lion Hill, Panamá).
- ↑ Six specimens.
Locality. Wing. Tail. Culmen. Tarsus. Middle
toe.males. Eight adult males from eastern Panamá 76.1 57.1 20.5 29.6 18.9 Two adult males (G. n. erralilis?) from western Panamá (Divala) 77.7 60.5 21.2 28.7 19 Ten adult males (G. n. erralilis) from southwestern Costa Rica 78.9 61.7 20.9 30 19.4 One adult male (G. n. sanctæ-martæ) from southwestern Columbia 81 60.5 21.5 30 18.5 females. Six adult females from eastern Panamá 73.6 55.4 19.7 29.2 18.8 Ten adult females (G. n. erralilis) from southwestern Costa Rica 75.1 59.3 19.9 29.4 18.9 One adult female (G. n. sanctæ-martæ) from southwestern Columbia 74 58 18.5 30.5 19.5
