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132 ANOPLOPS BICOLOR (Lawrence).

Adults {sexes alike). — Above plain chestnut-brown or vandyke brown, the forehead, lores, and sides of occiput slate color or slate- gray, the hindneck partly the same color; malar, suborbital, and auricular regions black; sides of neck and thence to flanks (broadly) lighter brown (prouts brown to nearly sepia), sometimes with indistinct dusky spots or streaks along outer edge, especially on sides of neck; chin, throat, chest, breast, and abdomen immaculate white; under tail-coverts brown (like flanks), tipped or margined with whitish or buffy; maxilla blackish, paler (sometimes dull whitish in dried skins) terminally and along tomium; mandible dull whitish or pale dull yellowish (in dried skins), darker basally; legs and feet horn color (in dried skins).

Adult male. — Length (skins), 136-139 (138); wing, 74.5-79.5 (76.8); tail, 45.5-52 (47.8); culmen, 18.5-20.5 (19.5); tarsus, 27-28.5 (27.7); middle toe, 17.5-19 (18.2).

Adult female. — Length, (skins), 125-126 (125.5); wing, 73-74 (73.5); tail, 47-47.5 (47.2); culmen, 18.5; tarsus, 26.5; middle toe, 17.

Panamá (Lion Hill; Chepo; Paraiso; Panamá; Cascajál, Coclé; Santa Fé de Verágua).


 * Pithys leucaspis (not Myrmeciza leucaspis Sclater), Ann. Lyc. N. Y., vii, 1862, 326 (Lion Hill, Panamá).
 * Pithys bicolor, Ann. Lyc. Nat. Hist. N. Y., vii, 1862, 484 (Lion Hill Station, Panamá Railway; coll. G. N. Lawrence); viii, 1867, 6 (Lion Hill). — and , Proc. Zool. Soc. Lond., 1864, 357 (Lion Hill). — , Proc. Zool. Soc. Lond., 1867, 145 (Santa Fé de Verágua, Panamá). — , Cat. Birds Brit. Mus., xv, 1890, 296, part (Panamá, Chepo, and Santa Fé de Verágua, Panamá).
 * [Pithys] bicolor and, Nom. Av. Neotr., 1873, 74, part (Panamá).
 * Gymnopithys bicolor and, Biol. Centr.-Am., Aves, ii, 1892, 221 (Santa Fé de Verágua, Lion Hill Station, Paraiso Station, and Chepo, Panamá).
 * [Gymnopithys] bicolor, Hand-list, iii, 1901, 30, part (Panamá).

ANOPLOPS OLIVASCENS (Ridgway).

Similar to A. bicolor, but pileum and hindneck wholly chestnut- brown, like rest of upper parts.

Adults (sexes alike). — Above plain chestnut-brown (prouts brown to vandyke brown or even nearly burnt-umber), including entire pileum and hindneck; narrow line immediately above bare orbital region, suborbital region, auricular region, and malar region black; sides of neck and thence (broadly) to flanks plain brown (varying from olive-brown