(syn. Grallaricula Ϯ Crescent-faced Antpitta G. lineifrons) Gr. αποκρυπτω apokruptō to hide from sight; ορνις ornis, ορνιθος ornithos bird; "APOCRYPTORNIS, new genus GENERIC DIAGNOSIS.— In color and general form somewhat resembling Hylopezus but general proportions much more slender and with rictal bristles as in Grallaricula; bill smaller and more subulate, tarsus and middle-toe actually as well as proportionately longer than in Grallaricula. ... TYPE.—Apocryptornis lineifrons, new species Apocryptornis lineifrons, new species ... Of this very distinct and strikingly marked bird we have but a single specimen, which fortunately is in excellent plumage and is beautifully prepared. To a combination of characters which readily distinguish it from any known species, it adds certain features not shown by other Grallariæ, while the conspicuous vertical white marks on each side of the forehead present a pattern of coloration that I do not recall having seen before." (Chapman 1924).