124 BULLETIN 50, UNITED STATES Né TIONAL MUSEUM. 
Southwestern Costa Rica (Pozo del Rio Grande, Paso Re4l, Lagarto, 
Boruca, and Barranca, Boruca; Buenos Aires; El General; Pozo del 
Pitél, Rio Naranjo; Pozo de Térraba; Pozo Azdél de Pirris; Las 
Trojas) and western Panam4 (Divala; Bugaba; Chiriquf). 
Myrmornis hoffmanni Capants, Journ. fiir Orn., Mar., 1861, 95 (Costa Rica; coll. 
Berlin Mus.). 
Formicarius hoffmanni Lawrence, Ann. Lyc. N. Y., ix, 1868, 110 (Costa Rica).— 
Franrzivus, Journ. fiir Orn., 1869, 306 (Costa Rica).—Satvin, Proc. Zool. 
Soc. Lond., 1866, 75, part (Costa Rica); 1870, 195 (Bugaba, Panam4).— 
Zevepon, Anal. Mus. Nac. Costa Rica, i, 1878, 115, part (Las Trojas and 
Pozo Aztl de Pirrfs, Costa Rica).—SciaTER, Cat. Birds Brit. Mus., xv, 1890, 
304, part (Bugaba, Ver4gua, and Chiriquf, Panam4).—Satvin and Gop- 
MAN, Biol. Centr.-Am., Aves, ii, 1892, 234, part (Las Trojas, Costa Rica; 
Chiriqui and Bugaba, Panam4).—Carriker, Ann. Carnegie Mus., vi, 1910, 
623 (s. w. Costa Rica, up to 1,500 ft.; crit.; habits). 
[Formicarius] hof'manni SctaTeR and Satvin, Nom. Av. Neotr., 1873, 75, part 
(Costa Rica).—SuHarpre, Hand-list, iii, 1901, 39, part (s. w. Costa Rica). 
Formicarius hoffmanni hoffmanni Banes, Auk, xxiv, July, 1907, 298 (Boruca, 
* Paso Rel, Pozo del Rio Grande, Lagarto, and Barranca, s. w. Costa Rica; 
crit.). 
Flormicarius] moniliger hoffmanni Riwaway, Proc. Biol. Soc. Wash., xxi, Oct. 
20, 1908, 195, in text. 
Formicarius umbrosus (not of Ridgway) Banes, Auk, xviii, 1901, 366 (Divala, 
Panam). 
FORMICARIUS MONILIGER PANAMENSIS Ridgway. 
PANAMA ANTTHRUSH. 
Similar to F. m. hoffmanni but averaging smaller, and coloration 
much lighter, the under parts more strongly suffused with olive and 
buffy, and color of under tail-coverts lighter, more tawny; black 
gular area more frequently(?) bordered posteriorly with a more or 
less distinct collar of deep vinaceous-cinnamon or dull cinnamon- 
rufous, or indication of one. 
Adult male—Length (skins), 153-172 (162); wing, 86-88 (87); 
tail, 50-55 (52.4); culmen, 20.5-21.5 (20.7); tarsus, 30-32 (80.9); 
middle toe, 18-19.5 (18.9).¢ 
Adult female-—Length (skins), 144-161 (154); wing, 84-88.5 
(86.9); tail, 48-51.5 (49.7); culmen, 18.5-20.5 (19.9); tarsus, 30-32 
(31); middle toe, 17-20 (18).2 © 
Eastern Panama, (Lion Hill, Obispo, and Paraiso stations, Panama 
railway; Chepo; Laguna del Pita; Cascajal, Coclé); Colombia (Remé- 
dios, Antioquia) ? 
> 
Formicarius analis (not Myothera analis Lafresnaye) LawrENcE, Ann. Lyc. N. Y., 
vii, 1862, 326 (Lion Hill station, Panama). 
Formicarius hoffmanni (not Myrmornis hoffmanni Cabanis) ScuaTeR and Satvin, 
Proc. Zool. Soc. Lond., 1864, 357 (Lion Hill, Panamé);(?) 1879, 526 (Remé- 
@ Four specimens. 
