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130 : Hypocnemis naevoides, Journ. für Orn., 1869, 306 (Costa Rica).
 * Hypocnemis nævoides, Anal. Mus. Nac. Costa Rica, i, 1887, 115 (Jiménez, Pacuare, and Angostura, Costa Rica).
 * Hylophylax nævioides, Ann. Carnegie Mus., vi, "Aug. 29" (= Sept. 7), 1910, 619 (Costa Rica; crit.; habits).
 * Hypocnemis nævioides capnitis, Proc. Biol. Soc. Wash., xix, July 30, 1906, 107 (Volcan de Miravalles, n. w. Costa Rica; coll. E. A. and O. Bangs).

 Genus ANOPLOPS Cabanis and Heine.


 * Gymnopithys "Schiff", Ann. Sci. Nat., sér. iv, i, 1854, 132. (Type not mentioned; nomen nudum.)
 * Anoplops and, Mus. Hein., ii, July, 1859, 9. (Type, Turdus rufigula Boddaert.)

Medium-sized Formicariidæ (length about 135-145 mm.) with second phalanx of middle toe partly united to outer toe, tail less than two-thirds (scarcely more than three-fifths) as long as wing, suborbital and postocular regions naked, outstretched feet reaching little if any beyond tip of tail, and plain coloration.

Bill shorter than head, narrow, wedged shaped in vertical profile (lateral outlines nearly straight), its width at frontal antiæ equal to or greater than its depth at same point and equal to half the distance from nostril to tip of maxilla, or less; culmen distinctly ridged, straight to near tip, where abruptly decurved, the tip of maxilla more or less distinctly (but not strongly) uncinate; tomia straight, slightly but distinctly notched subterminally; gonys strongly convex and prominent basally, gently or faintly convex and ascending terminally. Nostril exposed, posteriorly in contact with feathering of loral antiæ, narrow and longitudinally ovate (slit-like in A. rufigula) overhung by a broad membraneous operculum. Rictal bristles obsolete. Wing moderate or rather large, with longest primaries projecting decidedly beyond secondaries; sixth and seventh, or sixth, seventh and eighth, primaries longest, the tenth (outermost) about three-fifths as long as the longest, the ninth about as long (sometimes a little longer or shorter than) secondaries. Tail slightly more than three-fifths as long as wing, slightly rounded, the rectrices (12) rather narrow (A. rufigula) to rather broad (A. hicolor, etc.), rounded terminally. 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. Plumage full and blended, that of rump and flanks more elongated and lax; feathers 