118 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
g. Darker, the back, etc., raw-umber brown, the chest mouse gray. 
(British Honduras)....Formicarius moniliger intermedius (p. 121). 
gg. Paler, the back, etc., light olive-brown (or between broccoli brown 
and isabella color), the chest drab-gray. (Yucatan.) 
Formicarius moniliger pallidus (p. 121). 
ee. No rusty or cinnamomeous collar across foreneck. (Eastern Costa Rica 
and eastern Nicaragua)..... Formicarius moniliger umbrosus (p. 122). 
dd. Under tail-coverts wholly, or for much the greater part, rusty, tawny, or 
cinnamomeous. 
c. Forehead lighter and more rufescent or cinnamomeous brown than crown. 
f. Larger (wing averaging 93.5 in adult male, 91 in adult female); color of 
under parts more slaty, the under tail-coverts darker rusty. (South- 
western Costa Rica and western Panam4.) 
Formicarius moniliger hoffmanni (p. 123). 
ff. Smaller (wing averaging 87 in adult male, 86.9 in adult female); color 
of under parts more brownish or more strongly suffused with olive or 
buffy, the under tail-coverts paler, more tawny. (Eastern Panamé.) 
Formicarius moniliger panamensis (p. 124). 
ee. Forehead concolor with crown (not more rufescent or cinnamomeous). 
f. White loral spot small, sometimes obsolete; under parts nearly uniform 
deep brownish gray; under tail-coverts rufous-tawny. (Trinidéd, 
Venezuela, and adjacent coast district of Colombia.) 
Formicarius moniliger saturatus (extralimital).¢ 
ff. White loral spot large, conspicuous; under parts clear brownish gray, 
fading into nearly white on lower abdomen; under tail-coverts clear 
tawny. (British Guiana.) 
Formicarius moniliger crissalis (extralimital).0 
bb. Chest chestnut or rufous-tawny. 
c. Pileum rusty brown or chestnut. (Western Panam4 to eastern Costa Rica; 
northwestern Colombia?)..............--+-- Formicarius rufipectus (p. 125). 
ce. Pileum black. (Eastern Ecuadér.)...Formicarius thoracicus (extralimital).¢ 
FORMICARIUS ANALIS NIGRICAPILLUS (Ridgway). 
BLACK-HEADED ANTTHRUSH. 
Adult male—Head, all round, and chest uniform sooty black, this 
gradually passing through sooty blackish slate on upper breast into 
brownish slate-gray on abdomen, where (in fresh plumage) the 
feathers are margined terminally with dull buffy whitish; sides and 
flanks similar in color to breast, but faintly tinged with olive; hind- 
neck, sides of neck and general color of upper parts plain dark van- 
= Formicarius saturatus Ridgway, Proc. U. 8. Nat. Mus., xvi, no. 961, Nov. 28, 1893, 
677 (Princestown, Trinid4d; coll. Am. Mus. N. H.).—Formicarius analis saturatus 
Chapman, Bull. Am. Mus. N. H., vi, Feb. 16, 1894, 53 (Trinid4d).—Formicarius hoff- 
manni saturatus Hellmayr, Novit. Zool., xiii, 1906, 33 (Trinid4d; crit.). 
b Myrmornis crissalis Cabanis, Journ. fiir Orn., Mar., 1861, 96, in text (Roraima, 
Brit. Guiana).— Formicarius crissalis Sclater and Salvin, Proc. Zool. Soc. Lond., 1867, 
576 (Pard); Ridgway, Proc. U. 8. Nat. Mus., xvi, 1893, 676 (monogr.).—F[ormicarius] 
a{nalis] crissalis Hellmayr, Novit. Zool., xiv, Nov., 1907, 392 (geog. range). 
¢ Formicarius thoracicus Taczanowski and Berlepsch, Proc. Zool. Soc. Lond., 1885, 
101 (Machay, e. Ecuadér; coll. Branicki Mus.); Sclater, Cat. Birds Brit. Mus., xv, 
1890, 301, footnote; Ridgway, Proc. U. 8. Nat. Mus., xvi, 1893, 685 (monogr.). 
