Page:Birds of North and Middle America partV Ridgway.djvu/129

Rh : Myrmelastes ceterus, Proc. New Engl. Zool. Club, ii, Sept. 20, 1900, 25 (Loma del León, i. e.. Lion Hill, Panamá; coll. E. A. and O. Bangs).
 * [Myrmelastes] ceterus, Hand-list, iii, 1901, 32.

GYMNOCICHLA NUDICEPS ERRATILIS Bangs.

Similar to G. n. nudiceps but averaging slightly larger, the adult female averaging more intense in coloration.

Adult male. — Length (skins), 147-163.5 (153.5); wing, 75.5-83 (78.9); tail, 59.5-64.5 (61.7); exposed culmen, 20-22 (20.9); tarsus, 29.5-30.5 (30); middle toe, 19-20 (19.4). Adult female. — Length (skins), 137.5-153 (148); wing, 72.5-77.5 (75.1); tail, 56-62 (59.3); exposed culmen, 19-21 (19.9); tarsus, 29-30 (29.4); middle toe, 18-19.5 (18.9).

Southwestern Costa Rica (Boruca; Pozo del Rio Grande, Boruca; Térraba; Paso Reál de Térraba; Buenos Aires; El Generál; Pigres), and northwestern Panamá (Divala; Mina de Chorcha; Bugaba; Chitra)?


 * (?) Gymnocichla nudiceps (not Myiothera nudiceps Cassin?), Proc. Zool. Soc. Lond., 1870, 195, part (Mina de Chorcha and Bugaba, Verágua, Panamá; crit.). — , Cat. Birds Brit. Mus.,xv, 1890, 272, part (Mina de Chorcha, Bugaba, Chiriquí, and Chitra, Panamá). — and , Biol. Centr.-Am., Aves, ii, 1892, 223, part (Chiriquí, Bugaba, Minade Chorcha, and Chitra, Panamá).
 * Gymnocichla nudiceps (not Myiothera nudiceps Cassin), Expl. Zool. Merid. Costa Rica, 1893, 42 (Boruca, Térraba, and Buenos Aires, s. w. Costa Rica; crit.).
 * Gymnocichla nudiceps erratilis, Auk, xxiv, no. 3, July, 1907, 297 (Boruca, s. w. Costa Rica; coll. E. A. and 0. Bangs). — , Ann. Carnegie Mus., d, 1910, 620 (Costa Rica; crit.; habits).

GYMNOCICHLA CHIROLEUCA Sclater and Salvin.

Similar to G. nudiceps but adult male with bend of wing white and white tips to wing-coverts broader, much less of concealed white on back, and bill paler (plumbeous in life, whitish — at least terminally — in dried skins); adult female with wing-coverts very much darker, contrasting much more strongly with their tawny or rufescent tips.

Adult male. — General color uniform black; bend of wing, broad tips to all the wing-coverts, and broad edging to outermost feather of alula and outermost primary, white; feathers of anterior portion