BIRDS OF NORTH AND MIDDLE AMERICA. 111 
passing into ochraceous-buff on abdomen), the sides and flanks more 
brownish (nearly raw umber), the slate-gray restricted to chin and 
upper throat; wing, 63; tail, 41; culmen, 19; tarsus, 27; middle 
toe, 17. 
Eastern Panama (Cascajal, Coclé) and adjacent portion of north- 
western Colombia (Turbo). 
Myrmeciza exsul @ (not of Sclater, 1858) Casstn, Proc. Ac. Nat. Sci. Phila., 1860, 
191 (Turbo, Colombia). 
Myrmelastes cassini Ripaway, Proc. Biol. Soc. Wash., xxi, Oct. 20, 1908, 194 
(Turbo, n. w. Colombia; coll. U. 8. Nat. Mus.). 
MYRMECIZA EXSUL EXSOL Sclater. 
SCLATER'S ANTBIRD. 
Adult male—Head and neck, all round, uniform slate-black; upper 
parts (except pileum and hindneck) plain deep chestnut; lesser wing- 
coverts at least partly black, those along anterior margin of wing 
more or less extensively white, and behind this white margin often 
a few small dots of white; the carpo-metacarpal region also streaked 
with white, and outermost feather of alula sometimes edged with 
white; under parts (except chin, throat, flanks, anal region and 
under tail-coverts), plain blackish slate color; flanks, anal region, and 
under tail-coverts plain mummy or vandyice prown; bill black; iris 
brown; bare skin of postocular region and chin sky blue; legs and 
feet dusky (blackish horn color or dark bluish gray in life) length 
(skins), 126-148 (134); wing, 64-71 (67.4); tail, 44-49 (46.8); culmen, 
18.5-21.5 (20.2); tarsus, 27-29.5 (28.2); middle toe, 17.5-19 (17.9).° 
Adult female.—Upper parts as in adult male, but slate-black of 
pileum and hindneck slightly duller; chin and throat slate-blackish, 
but usually duller than in adult male; rest of under parts plain van- 
dyke or mummy brown; bill, etc., as in adult male, but mandible 
« The following citations of Myrmeciza (or Myrmelastes) exsul refer to one or more 
allied forms: 
Myrmeciza exsul (not of Sclater, 1858) ScuarzR, Proc. Zool. Soc. Lond., 1860, 
294 (Esmeraldas, w. Ecuad6r; crit.); Cat. Am. Birds, 1862, 187 (Esmer- 
aldas); Cat. Birds Brit. Mus., xv, 1890, 279 (Esmeraldas and Intac, Ecuadér; 
Nechi, Colombia).—Sciater and Satvin, Proc. Zool. Soc. Lond., 1879, 526 
(Nechi, Antioquia, Colombia).—BzERLEpscn and Taczanowsk1, Proc. Zool. 
Soc. Lond., 1883, 566 (Chimbo, w. Ecuadér; crit.) —Satvapori and Festa, 
Boll. Mus. Zool., ete., Torino, xv, 1899, no. 362, p. 31 (Foreste del Rio Peripa, 
w. Ecuadér).—Hartert, Novit. Zool., v, 1898, 493 (Cachavi, n. w. Ecua- 
dor).—GoopreELLow, Ibis, 1902, 65 (Santo Domingo and Guanacillo, n. w. 
Ecuadér; habits, etc.). 
[Myrmeciza] exsul Scrater and Sarvin, Nom. Av. Neotr., 1873, 74. 
[ Myrmelastes] exsul SHarre, Hand-list, iti, 1901, 32 (Colombia to Ecuadér). 
(The bird from Nechi, Colombia, may possibly be XM. cassini.) 
b Sixteen specimens. 
