Robert Ridgway

“ Anoplops lunulata differs from A. bicolor and its allies in more slender bill, much narrower and more broadly operculate nostrils, and very much denser as well as longer feathering of the loral region. The style of coloration is somewhat different, there being no white on the under parts, the chin and throat being rufous-tawny and the under parts of the body brown. The naked skin on sides of head, together with the legs and feet, are yellow, instead of blue and dusky horn color, respectively, as in A. bicolor, etc. ”

“ Adult males with head, neck, chest, and median portion of breast (usually of abdomen also) uniform black, the sides and flanks white or light gray; wings and tail black varied with white, the back brown or grayish, or black with a large concealed patch of white; adult females olive-brown to tawny-brown above, the wings dusky varied with buffy or whitish, the pileum blackish or rufescent ”

“ The bill is hardly longer than in Formicivora, but smaller; the nostrils are more elongated, and have a slight membraneous operculum as in Psilorhamphus. The tail is rather long, thin, and delicate; the tarsi are more like those of Formicivora, and show the divisions of the scutes." [3]
"Terenura is a peculiar genus of doubtful affinities, but remarkable for the bright colours of its members. These colours (black, bright yellow, chestnut, and olive) , it is true, are all to be found in different species of Formicariidæ, but in Terenura alone are they associated in a single bird." ”

“ Immature male. — Similar to the adult male, but plumage suffused, more or less, with pale fulvous or brownish buff.
Young (male ?) . — Similar in general coloration to the adult female but pileum mostly black, scapulars, interscapulars, and wing-coverts distinctly barred with dull black, and rump indistinctly barred with dusky; black bars on under parts rather narrow, the ground color very pale buff or buffy white. ”

“ Adult male. — General color deep black, passing into slate color on sides and flanks; interscapulars extensively pure white beneath the surface (partly exposed) ; anterior portion of lesser wing-covert area (except on bend of wing) white, the other lesser coverts and middle coverts with a small roundish terminal spot of white; greater coverts broadly tipped with white, forming a very conspicuous band across wing; rectrices (except middle pair) broadly tipped with white (the white tips growing smaller toward middle rectrices) ”

“ DUSKY TYRANNINE ANTBIRD.
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. ”

“ Tarsus about one-third as long as wing, booted (nonscutellate) or with scutella of acrotarsium very indistinct; middle toe, with claw, nearly as long as tarsus; outer toe, without claw, not reaching to middle of subterminal phalanx of middle toe, the inner toe slightly shorter; hallux about as long as inner toe but much stouter; middle toe united for whole of basal and part of second phalanx to outer toe, for half or more of basal phalanx to inner toe; claws rather large and strongly curved, that of the hallux decidedly shorter than the digit. ”

“ Adult males nearly uniform gray or dusky, with hinder parts more or less rufescent and (usually) barred, sometimes with the forehead silvery gray, some species with throat or throat and breast white; adult females similar but duller in color and more barred ”

“ Much like the adult male but coloration much duller, the chestnut of back mixed or tinged with sooty brown, the head, neck, and chest sooty blackish or brownish slate-black, and under parts of body mixed sooty brown and tawny brown. ”

“ Adult male. — Above plain olive (varying from grayish to brownish olive) , becoming slightly grayer on pileum (where feathers are very indistinctly margined or flecked with dusky) and more brownish posteriorly; upper tail-coverts and tail much browner (sepia brown to prouts brown) ; more anterior lesser wing-coverts plain olive, the more posterior ones partly or wholly black, each with a terminal spot of buff; middle and greater coverts black with a terminal guttate or subtriangular spot of buff; remiges brownish olive to olive-brown (nearly prouts brown) ”

“ Above plain brown, the wings (sometimes pileum also) more rufescent, the tail chestnut or deep cinnamon-rufous; under parts plain olive-buffy or yellowish, more grayish olive on flanks; adult males with a concealed dorsal patch of ochraceous or tawny. ”

“ Adult male. — Head and neck, above and laterally, black, each feather with a conspicuous mesial guttate streak of buffy white; under parts, including chin and throat, dull slate-gray, similarly but more broadly streaked, as far back as the lower abdomen, where the streaks become obsolete and the ground color paler and more buffy gray; under tail-coverts cinnamon with narrow shaft-streaks of paler; thighs deeper cinnamon, or russet; under wing-coverts and broad edgings to inner webs of primaries deep cinnamon-buff ”

“ Medium-sized Formicariidæ (length about 130-150 mm.) with planta tarsi broadly rounded (not ridged) behind; tarsus only one- fourth as long as wing; tail only two-fifths as long as wing, nearly even; bill as long as or longer than head (commissure longer than tarsus) , with mesorhinium broad and flattened basally; coloration variegated, with a white or fulvous band across subbasal portion of remiges, and outer web of primaries crossed by an oblique subterminal band of buff or fulvous. ”

“ Plumage full, blended, moderately lax, that of the rump much developed; pileum with a full decumbent crest of broad, rounded feathers.
Coloration. — Adult male black, the upper parts (except pileum) narrowly, the under parts more broadly, barred with white; adult female with pileum chestnut, the rest of plumage barred with chestnut or brown and buffy or pale fulvous. ”