Page:Birds of North and Middle America partV Ridgway.djvu/143

Rh : [Thamnophilus] immaculatus and, Nom. Av. Neotr., 1873, 69, part.
 * Myrmelastes immaculatus and, Biol. Centr.-Am., Avea, ii, 1892, 225, part (Costa Rica and Panama localities and references). — , Proc. New Engl. Zool. Club, iii, 1902, 42 (Volcan de Chiriqui, 2,000 ft.).
 * [Myrmelastes] immaculatus, Hand-list, iii, 1901, 32, part.
 * Myrmeciza immaculata, Ann. Carnegie Mus., vi, 1910, 618 (Caribbean slope Costa Rica, 1,000-4,000 ft.; crit.)
 * Myrmeciza zeledoni, Proc. Biol. Soc. Wash., xxii, April 17, 1909, 74 (Guayabo, Costa Rica; coll. U. S. Nat. Mus.).

 Genus FORMICARIUS Boddaert.


 * Formicarius, Tabl. Pl. Enl., 1783, 43. (Type, F. cayanensis Boddaert = F. colma Boddaert.)
 * (?) Myrmecophaga, Tableaux Oiseaux, 1799, 6. (Type undeterminable, no species being named; nomen nudum.)
 * Myotthera, Av. Sp. Nov. Brazil, i, 1824, 72. (Type, M. ruficeps Spix = Turdus colma Gmelin.)
 * Myothera and, Mag. de Zool., 1839 (Synopsis Avium, p. 14). (Type, M. analis D'Orbigny and Lafresnaye.)
 * Myrmothera, part,, Analyse, 1816, 43, 70. (Type, none specified, and no species named; includes "Befroi, et quelques autres fourmilliers de Buffon").
 * Myocincla, Classif. Birds, ii, 1837, 230. (Type, Turdus colma Gmelin = Formicarius colma Boddaert.)

Rather large Formicariidæ (length about 150-180 mm.) with very dense, compact plumage; bill much shorter than head, depressed basally; short, rounded tail (less than two-thirds as long as the short and concave, rather pointed wing); latero-frontal antiæ with feathering short and dense; scutellate tarsi, short anterior claws, and plain coloration.

Bill shorter than head (exposed culmen about as long as distance from nostril to posterior angle of eye), with straight lateral outlines, slightly depressed basally, its width at latero-frontal antiæ greater than its depth at same point and equal to half the distance from nostril to tip of maxilla, or slightly less; culmen distinctly ridged, straight or nearly so for most of its length, decurved terminally, the tip of maxilla inconspicuously and rather obtusely uncinate; maxillary tomium slightly convex posteriorly, straight anteriorly, slightly notched sub terminally; mandibular tomium faintly concave posteriorly, nearly straight or very faintly convex anteriorly, very indistinctly notched subterminally; gonys decidedly to rather 