80 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult female—Length (skins), 96-109 (103); wing, 45-52 (48.2); 
tail, 40-46.5 (42.1); culmen, 12.5-14 (13.5); tarsus, 15-17 (15.8); 
middle toe, 8.5-10 (9.1).% 
Nicaragua (Chontales; Los Sabalos; Rio Escondido; San Emilis), 
Costa Rica (San Carlos; Pejé; Pacuare; La Balsa; Talamanca; 
Siptrio; Rio Sicsola; Jiménez; Angostura; Gudpiles; Gudcimo; 
Siquirres; La Cristina; Tuis; El Hogar; San José; La Concepcién; 
La Florida; Pozo Azil de Pirris; Pozo del Pitél; Pozo del Rio 
Grande; Paso Real; Lagarto; Boruca; Buenos Aires; Palmar; El 
General; La Vij4gua), and Panama (Divala and Bugaba, Chiriquf; 
Panamé; Lion Hill). 
Formicivora boucardi (not of Sclater, 1858) SctaTer and Satvin, Proc. Zool. Soc. 
Lond., 1864, 356 (Panama; crit.)—Satvin, Proc. Zool. Soc. Lond., 1870, 
195 (Bugaba, Panamé); Ibis, 1872, 318 (Chontales, Nicaragua).—Bovucarp. 
Proc. Zool. Soc. Lond., 1878, 61 (San Carlos, Costa Rica).—Nurrine, Proc, 
U.S. Nat. Mus., vi, 1884, 405 (Los SAbalos, Nicaragua; habits).—SciaTeErR, 
Cat. Birds Brit. Mus., xv, 1890, 254, part (Chontales, Nicaragua; Pejé and 
Angostura, Costa Rica; Panamé, Bugaba, and Chiriqui, Panamd).—Saivin 
and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 216, part (Chontales and 
Los Sdbalos, Nicaragua; Angostura, Pacuare, Pejé, San Carlos, Jiménez, 
La Balsa, and Pozo Azul de Pirrfs, Costa Rica; Chiriqui, Bugaba, and Lion 
Hill, Panam4).—Ricumonp, Proc. U. 8. Nat. Mus., xvi, 1893, 501 (Rio 
Escondido, Nicaragua; habits)—Currriz, Expl. Zool. Merid. Costa Rica, 
1893, 43 (Palmdr, Lagarto, Boruca, and Buenos Aires, s. w. Costa Rica; 
habits)—Banes, Auk, xxiv, 1907, 296 (Boruca, Paso Redél, Pozo del Rio 
Grande, and Lagarto, s. w. Costa Rica). 
[Formicivora] boucardi ScLaTeR and Satvin, Nom. Av. Neotr., 1873, 72, part.— 
SHarPe, Hand-list, iii, 1901, 26, part. 
Fornvicivora boucardii Lawrence, Ann. Lyc. N. Y., ix, 1868, 108 (Angostura, 
San José, and Pacuare, Costa Rica).—Frantzius, Journ. fiir Orn., 1869, 305. 
(Costa Rica)—ZeLEpOn, Anal. Mus. Nac. Costa Rica, i, 1887, 115 (Pozo 
Aztl, Pacuare, Jiménez, and La Balsa, Costa Rica). 
Formicivora boucardi CHERRIE, Anal. Inst. Fis.-Geog. Costa Rica, vi, 1893, 19 
(Pozo del Pitdl, Costa Rica). 
Formicivora quixensis (not Thamnophilus quixensis Cornalia) LAwrENcE, Ann, 
Lyc. N. Y., vii, 1862, 325 (Lion Hill Station, Panam). 
.Formicivora virgata LAwreEncE, Ibis, v, April, 1863, 182 (Lion Hill Station, 
Panama; coll. G. N. Lawrence); Ann. Lyc. N. Y., viii, 1863, 484 (Lion 
Hill).—Sanviw and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 217 (Chon- 
tales, Nicaragua; Lion Hill, Panamé4). 
D[rymophila] virgata Ricumonp, Auk, xvi, Oct., 1899, 354, in text. 
[Formicivora] virgata Suarre, Hand-list, iii, 1901, 26 (Panamé to Nicaragua). 
Formacivora boucardi virgata CarRikER, Ann. Carnegie Mus., vi, 1910, 610 (Costa 
Rica; crit.; habits). 
MICRORHOPIAS BOUCARDI CONSOBRINA (Sclater). 
ECUADORIAN ANTWREN. 
Similar to M. b. virgata, but adult male with rectrices more broadly 
tipped with white, the adult female with under parts deep chestnut 
@ Fourteen specimens. 
