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Rh Peripa, w. Ecuadór; crit.). — and, Biol. Centr.-Am., Aves, ii, 1892, 214, part (Lion Hill, Panamá, and Chepo, Panamá; Colombia; Ecuadór; Peru; Guiana). — , Proc. New Engl. Zool. Club, ii, 1900, 23 (Loma del Leon, Panamá). — , Novit. Zool., ix, 1902, 612 (San Javier and Pambilár, n. w. Ecuadór; crit.). —  and , Novit. Zool., ix, 1902, 76 (Munduapo, etc., Venezuela). — , Novit. Zool., xii, 1905, 286 (near Pará, Brazil; crit.); xiii, 1906, 370 (Prata, near Pará); xiv, 1907, 32 (Obidos, Brazil; crit.). —  and , Bull. Mus. Comp. Zool., xlvi, 1906, 217 (Sabana de Panamá).
 * [Cercomacra] tyrannina, Orn. Bras., iv, Abth., 1870, 419. — and , Nom. Av. Neotr., 1873, 73, part. — , Hand-list, iii, 1901, 28, part (Panama; Colombia; Ecuador; Guiana; Amazonia).
 * Hypocnemis schistacea (not of Sclater), Ann. Lyc. N. Y., vii, 1862, 325 (Lion Hill, Panamá).
 * Disythamnus rufiventris, Ann. Lyc. Nat. Hist. N. Y., viii, 1867, 131 (Lion Hill, Panamá; coll. G. N. Lawrence; = young male; see Salvin, Ibis, 1874, 316).

CERCOMACRA TYRANNINA CREPERA (Bangs).

Similar to C. t. tyrannina but adult male with coloration averaging much darker, the general color of upper parts blackish slate to slate- black, under parts slate color to blackish slate; adult female and young male not always distinguishable from those of C. t. tyrannina, but usually with color of upper parts darker and more brownish olive, the under parts decidedly deeper tawny.

Adult male. — Length, (skins), 124-148 (137); wing, 60-67 (63.4); tail, 54.5-62.5 (57.2); culmen, 15-18 (16.6); tarsus, 21.5-24 (22.9); middle toe, 12.5-14 (13.5).