BIRDS OF NORTH AND MIDDLE AMERICA. 103 
covers solidly the exposed surface of lesser wing-covert area paler. 
(Older specimens showing admixture of black, according to age.) 
Immature female —Similar to the immature male. 
Northwestern Panam4 (Mina de Chorcha, Chiriqu{); eastern Costa 
Rica (Tucurriqui; Jiménez; ‘‘San José;” El Hogar; Cuabre; Guapiles; 
Rio Sicsola; La Cristina; Talamanca), through Nicaragua (Matagalpa; 
Rio Escondido; San Emilis, Lake Nicaragua) and Honduras (Omoa; 
Santa Ana) to Guatemala (Los Amates, Yzabal). 
Gymnocichla nudiceps (not Myiothera nudiceps Cassin) Moore, Proc. Zool. Soc. 
Lond., 1859, 55 (Omoa, Honduras; habits).—Scuarer and Sanyrn, Proc. 
Zool. Soc. Lond., 1859, 119 (Omoa).—Lawrencz, Ann. Lyc. N. Y., ix, 
1868, 109 (Tucurrfqui, Costa Rica).—Franrzius, Journ. fiir Orn., 1869, 305 
(Costa Rica). 
Gymnocichla chiroleuca ScuaTER and Sanvin, Proc. Zool. Soc. Lond., 1869, 417 
(Tucurriqui, Costa Rica; coll. Salvin and Godman).—Scrater, Cat. Birds 
Brit. Mus., xv, 1890, 272 (Tucurriqui, Costa Rica; Honduras).—Rineway, 
Proc. U. 8. Nat. Mus., xiv, 1891, 469 (Santa Ana, Honduras; descr. female 
and young male).—Satvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 
224.—Ricumonp, Proc. U. 8S. Nat. Mus., xvi, 1893, 501 (Rio Escondido, 
Nicaragua; habits, notes, etc.).—DrarBorn, Pub. 125, Field Mus. Nat. 
Hist., 1907, 109 (Los Amates, Guatemala). 
G[ymnocichla] chiroleuca Saivin, Ibis, 1869, 314, 318. 
[Gymnocichla] chiroleuca ScuaTER and Satvin, Nom. Av. Neotr., 1873, 73.— 
SHarpe, Hand-list, iii, 1901, 32. 
Gymnocichla cheiroleuca CARRIKER, Ann. Carnegie Mus., vi, 1910, 621 (Caribbean 
lowlands to about 1,000 ft., Costa Rica; habits). 
Myrmelastes lawrencti Sauvin and Gopman, Biol. Centr.-Am., Aves, ii, sig. 29, 
March, 1892, 226 (Mina de Chorcha, Chiriquf, Panamé; coll. Salvin and 
Godman). 
Myrmelastes lawrencei Ricumonp, Proc. U. 8. Nat. Mus., xvi, 1893, 502 (Rio 
Escondido, Nicaragua). 
[Myrmelastes] lawrencet SHARPE, Hand-list, iii, 1901, 32. 
Genus MYRMECIZA Gray. 
Myrmeciza Gray, List Gen. Birds, 1841, 34. (Type, Myrmothera longipes Vieillot.) 
Myrmonax 4 CaBanis, in Wiegmann’s Archiv fiir Naturg., xiii, pt. i, 1847, 210. 
(Type, Myrmothera longipes Vieillot.) 
Myrmelastes ScuateR, Proc. Zool. Soc. Lond., 1858, 274. (Type, VM. plumbeus 
Sclater.) 
Medium-sized Formicariide (length about 130-165 mm.) resem- 
bling Gymnocichla but loral and suborbital regions feathered (only 
the postocular and rictal regions naked), tail relatively shorter (two- 
thirds to three-fourths, instead of four-fifths, as long as wing), the 
adult males not black (or else without white tips to wing-coverts). 
Bill shorter than head, rather slender to moderately stout, its 
width at frontal antiz equal to or slightly greater than its depth at 
same point and equal to nearly if not quite half the distance from 
nostril to tip of maxilla; culmen distinctly (sometimes rather sharply) 
@ pbopoc=pboyn€, Ameise; dvaé, Herrscher, tyrannus. (Cabanis.) 
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