132 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ANOPLOPS BICOLOR (Lawrence). 



BICOLORED ANTBIRD. 



Adults (sexes alike). — Above plain chestnut-brown or Vandyke 

 brown, the forehead, lores, and sides of occiput slate color or slate- 

 gray, the hindneck partly the same color; malar, suborbital, and 

 auricular regions black; sides of neck and thence to flanks (broadly) 

 lighter brown (p routs brown to nearly sepia), sometimes with indis- 

 tinct dusky spots or streaks along outer edge, especially on sides of neck ; 

 chin, throat, chest, breast, and abdomen immaculate white; under 

 tail-coverts brown (like flanks), tipped or margined with whitish or 

 bufty; maxilla blackish, paler (sometimes dull whitish in dried skins) 

 terminally and along tomium; mandible dull whitish or pale dull 

 yellowish (in dried skins), darker basally; legs and feet horn color 

 (in dried skins). 



Adult male.— Length (skins), 136-139 (138); wing, 74.5-79.5 (76.8); 

 tail, 45.5-52 (47.8); culmen, 18.5-20.5 (19.5); tarsus, 27-28.5 (27.7); 

 middle toe, 17.5-19 (18.2).« 



Adult feTnale.— Length (skins), 125-126 (125.5);'' wing, 73-74 

 (73.5);^ tail, 47-47.5 (47.2);^ culmen, 18.5;'^ tarsus, 26.5;'^ middle 

 toe, 17." 



Panama (Lion Hill; Chepo; Paraiso; Panama; Cascajal, Code; 

 Santa Fe de Verdgua). 



Pithys leucaspis (not Myrmedza Icucaspis Sclater) Lawrence, Ann. Lyc.N. Y., 

 vii, 1862, 326 (Lion Hill, Panama). 



Pithys hicolor Lawrence, Ann. Lye. Nat. Hist. N. Y., vii, 1862, 484 (Lion Hill 

 Station, Panamd Railway; coll. G. N. Lawrence); viii, 1867, 6 (Lion Hill). — 

 Sclater and Salvin, Proc. Zool. Soc. Lond., 1864, 357 (Lion Hill). — Salvin, 

 Proc. Zool. Soc. Lond., 1867, 145 (Santa Fe de Veragua, Panamd). — Sclater, 

 Cat. Birds Brit. Mus., xv, 1890, 296, part (Panamd, Chepo, and Santa Fe de 

 Verdgua, . Panama) . 



[Pithys] hicolor Sclater and Salvin, Nom. Av. Neotr., 1873, 74, part (Panamd). 



Gymnopithys hicolor Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 221 

 (Santa Fe de Verdgua, Lion Hill Station, Paraiso Station, and Chepo, Panamd). 



[Gymnopithys] hicolor Sharpe, Hand-list, iii, 1901, 30, part (Panamd). 



ANOPLOPS OLIVASCENS (Ridgway). 



OLIVE-SIDED ANTBIRD. 



Similar to A. hicolor, but pileum and hindneck wholly chestnut- 

 brown, like rest of upper parts. 



Adults (sexes alike). — Above plain chestnut-brown (prouts brown to 

 Vandyke brown or even nearly burnt-umber), including entire pileum 

 and hindneck; narrow line immediately above bare orbital region, sub- 

 orbital region, auricular region, and malar region black; sides of neck 

 and thence (broadly) to flanks plain brown (varying fi*om olive-brown 



o Three specimens. & Two specimens. c One specimen. 



