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 pallidas (p. 121). 

 ee. No rusty or cinnamomeous collar across foreneck. (Eastern Costa Kica 



and eastern Nicaragua) Formicarius moniliger umbrosus (p. 122). 



dd. Under tail-coverts wholly, or for much the greater part, rusty, tawny, or 

 cinnamomeous. 

 e. Forehead lighter and more rufescent or cinnamomeous brown than crown. 

 /. 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 Pananui.) 



Formicarius moniliger hoflfmanni (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 Panamd.) 



Formicarius moniliger panamensis (p. 124). 



ee. Forehead concolor with crown (not more rufescent or cinnamomeous). 



/. White loral spot small, sometimes obsolete; under parts nearly uniform 



deep brownish gray; under tail-coverts rufous- tawny. (Triniddd, 



Venezuela, and adjacent coast district of Colombia.) 



Formicarius moniliger saturatus (extralimital).a 

 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).^ 

 hh. Chest chestnut or rufous-tawny, 

 c. Pileum rusty brown or chestnut. (Western Panama to eastern Costa Rica; 



northwestern Colombia?) Formicarius rufipectus (p. 125). 



cc. Pileum black. (Eastern Ecuador.)... Formicarius thoracicus (extralimital).c 



FORMICARIUS ANALIS NIGRICAPILLUS (Ridgway). 



BLACK-HEADED ANTTHRUSH. 



Adult male. — Head, all round, and chest uniform sooty black, tliis 

 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- 



a Formicanus saturatus Ridgway, Proc. U. S. Nat. Mus., x\'i, no. 961, Nov. 28, 1893, 

 677 (Princestown, Trinidad; coll. Am. Mus. N. H.). — Formicanus analis saturatus 

 Chapman, Bull. Am. Mus. N. H., vi, Feb. 16, 1894, 53 {TrlmdM).— Formicarius hoff- 

 manni saturatus Hellmayr, Novit. ZooL, xiii, 1906, 33 (Triniddd; crit.). 



b Myrmornis crissalis Cabanis, Journ. fiir Orn., Mar., 1861, 96, in text (Roraima, 

 Brit. Guiana). — Formicarius mssaKs Sclater and Salvin, Proc. Zool. Soc. Lond., 1867, 

 576 (Pard); Ridgway, Proc. U. S. Nat. Mus., xvi, 1893, 676 {monogr. ).—F[ormicarivi] 

 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. Ecuador; coll. Branicki Mus.); Sclater, Cat. Birds Brit. Mus., xv, 

 1890, 301, footnote; Ridgway, Proc. U. S. Nat. Mus., xvi, 1893, 685 (monogr.). 



