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Rh Costa Rica (Angostura; Cartago, Birrís, La Estrella, Naranjo, and Azahár, Cartago; Volcan de Irazú; Cervantes; Coliblanco; Juan Viñas; La Hondura; Cariblanco de Sarapiquí; Santa Maria, Laguaria, and Los Reyes, Dota) and western Panamá (Calovévora; Calobre; Boquete; Volcán de Chiriquí, 4,500-7,800 feet).


 * Anabazenops lineatus, Ann. Lyc. Nat. Hist. N. Y., viii, 1867, 127 (Angostura, Costa Rica; coll. U. S. Nat. Mus.); ix, 1868, 106 (Angostura, Birrís, and Cervantes, Costa Rica). — , Journ. für Orn., 1869, 304 (Costa Rica). — , Ibis, 1870, 110 (crit.). — , Proc. U. S. Nat. Mus., xi, 1888, 565 (crit.).
 * [Xenops] lineatus, Hand-list, i, 1869, 175, no. 2368.
 * Anabazenops sitbalaris lineatus, Proc. U. S. Nat. Mus., xi, sig. 36, Sept. 25, 1889, 566 (diagnosis).
 * Anabazenops subalaris (not Anabates subalaris Sclater), Ibis, 1870, 110 (Costa Rica; crit.); Proc. Zool. Soc. Lond., 1870, 192 (Calovévora, Verágua). — , Cat. Birds Brit. Mus., xv, 1890, 108, part (Calovévora, Verágua; Irazú distr., Costa Rica). — and , Biol. Centr.-Am., Aves, 11, 1891, 163, part (Angostura, "Pirris," i. e., Birrís, Cervantes, and Volcan de Irazú, Costa Rica; Calobre and Calovévora, Verágua).
 * [Xenicopsis] subalaris, Hand-list, iii, 1901, 71, part (Costa Rica; Panamá).
 * Xenicopsis subalaris lineatus, Proc. New Engl. Zool. Club, iii, Jan. 30, 1902, 44 (Boquete and Volcán de Chiriquí, 4,500-7,800 ft., Panamá). — , Ann. Carnegie Mus., vi, 1910, 643 (Costa Rica; crit.). — , Pub. 146, Field Mus. N. H., orn. ser., i, no. 6, 1910, 270 (Coliblanco, Costa Rica; crit.).

 Genus AUTOMOLUS Reiehenbach.


 * Automolus (not Automolis Hübner, 1816),, Handb. Spec. Orn., 1853, 174. (Type, Sphenura sulphurascens Lichtenstein = Anabates leucophthulmus Maximilian.)
 * Cichlocolaptes, Handb. Spec. Orn., 1853, 174. (Type, Anabates ferruginolentus Maximilian.)
 * Ipoborus and, Mus. Hein., ii, Aug. 26, 1859, 31. (Type, Sphenura sulphurascens Lichtenstein = Anabates leucophthalmus Maximilian.)

Large Furnariidæ (length about 180-200 mm.) with roundish, nonoperculate nostrils, basal phalanx of middle toe not wholly united to lateral toes, rather long and narrow bill (culmen, from base, longer than tarsus), and unstreaked coloration.

Bill nearly as long as head, narrow, compressed, its width at loral antiæ much less than its depth at same point and contained two and a half to more than three times in distance from nostril to tip of maxilla; culmen longer than tarsus, broadly and rather indistinctly ridged, nearly straight or very slightly curved for basal half or more, moderately and gradually decurved terminally, the tip of maxilla distinctly decurved but not uncinate; tomia straight for most of their length, slightly but distinctly decurved terminally, without trace of notch; 