KEY TO THE SUBSPECIES OF PREMNOPLEX BRUNNESCENS.
a. Throat more rufescent; general color darker, with black margins to feathers of under parts broader.
- b. Throat paler (ochraceous to tawny-ochraceous). (Central to northwestern Colombia.)
- bb. Throat darker (deep tawny-ochraceous to rufous-tawny.) (Santa Marta district of Colombia.)
aa. Throat paler (buff to ochraceous-buff); general color paler, with black margin to feathers of under parts narrower. (Costa Rica and Panamá.)
PREMNOPLEX BRUNNESCENS BRUNNEICAUDA (Lawrence).
COSTA RICAN PREMNOPLEX.
Adults (sexes alike). — Pileum olive or deep grayish olive, the feathers margined with dusky, those of the forehead with rather broad mesial streaks of buff; rest of upper parts mummy brown passing into vandyke brown on rump and upper tail-coverts, the scapulars and interscapulars indistinctly margined with dusky, the latter (especially on upper back) sometimes with narrow and mostly indistinct shaft-streaks of buff; tail darker or duller vandyke brown than rump, sometimes nearly seal brown; loral, superciliary, and supra-auricular regions buff, the latter streaked with dusky; auricular and suborbital regions dusky or dark sooty brown, streaked (the latter spotted or flecked) with buffy; malar region, chin, and throat deep buff, the feathers of throat usually indistinctly margined with blackish; rest of under parts olive, conspicuously variegated with large spots and streaks of light buff and black or dusky margins to the feathers, the former largest on chest, where occupying all of each feather except a broad black margin, narrower, more streak-like on sides, more indistinct on abdomen and flanks, indistinct or obsolete on under tail-coverts; maxilla black, mandible dull whitish or yellowish (in dried skins) with a sharply defined stripe of blackish along tomia; iris brown; legs and feet dusky or horn color (in dried skins).
Young. — Similar to adults in coloration but under parts of body with margins to feathers rather broader and more blackish and mesial spots and streaks rather deeper buff.
- ↑ Margarornis brunnescens Sclater, Proc. Zool. Soc. Lond., June 16, 1856, 27, pl. 116 (Bogotá, Colombia; coll. P. L. Sclater); Cat. Birds Brit. Mus., xv, 1890, 123, part. — Premnoplex brunnescens brunnescens Bangs, Proc. Biol. Soc. Wash., xxi, July 27, 1908, 159 (centr. and w. Colombia to Peru; crit.).
- ↑ Premnoplex coloratus Bangs, Proc. New Engl. Zool. Club, iii. Mar. 31, 1902, 84 (San Miguel, Santa Marta, Colombia, 7,500 ft.; coll. E. A. and 0. Bangs). — Premnoplex brunnescens coloratus Bangs, Proc. Biol. Soc. Wash., xxi, July 27, 1908, 159 (Sierra Nevada de Santa Marta; crit.).
