74 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult female—Similar to the adult male but whole throat plain 
buffy, and general color of wing-coverts dusky olive instead of 
blackish; length (skins), 86-107 (99); wing, 48-52.5 (50.5); tail, 
31.5-36 (34.2); culmen, 14-15.5 (14.6); tarsus, 16-17 (16.6); middle 
toe, 10.5-11.5 (11). 
Southern Honduras (Rio Segévia) through Nicaragua (Rio Escon- 
dido; San Emilis, Lake Nicaragua), Costa Rica (Angostura; San 
José; San Carlos; Jiménez; Rio Reventazén; Rio Matina; Pacuare; 
Siquirres; Sipdrio; Cuabre; Gu4piles; Carrillo; El Hogar; Guacimo; 
La Vijagua; La Cristina), Panamé (Lion Hill) and Colombia (Remé- 
dios, Antioquia; Naranjo, Bucaramanga; Rio Truando) to western 
Ecuador (Esmeraldas; Foreste del Rio Peripa).? 
Myrmotherula gularis (not Thamnophilus gularis Spix) SctatTER, Proc. Zool. Soc. 
Lond., 1860, 294, part (Panama). 
Myrmotherula ornata (not Formicivora ornata Sclater) Cassin, Proc. Ac. Nat. Sci. 
Philad., 1860, 191, part (Rio Truando, Colombia). 
Myrmotherula, sp. no. 216, Lawrence, Ann. Lyc. N. Y., vii, 1862, 325 (Lion Hill, 
Panamé4). 
Myrmetherula fulviventris LawRENCcE, Ann. Lyc. Nat. Hist. N. Y., vii, Feb., 1862, 
468 (Lion Hill, Panam4; coll. G. N. Lawrence). 
Myrmotherula fulviventris ScLATER and Savin, Proc. Zool. Soc. Lond., 1864, 356 
(Lion Hill; crit.); 1879, 525 (Remédios, Antioquia, Colombia).—LaWRENCE, 
Ann. Lyc. N. Y., ix, 1868, 108 (Angostura, Costa Rica).—Franrzrus, Journ. 
fir Orn., 1869, 305 (Costa Rica).—Wyart, Ibis, 1871, 331 (Naranjo, Colom- 
bia).—Satvin, Ibis, 1874, 311 (Rio Truando, Colombia; crit.) —BERLEPScH, 
Journ. fiir Orn. 1884, 318 (Naranjo, Bucaramanga, Columbia).—Ripeway, 
Proc. U. 8. Nat. Mus., x, 1887, 590 (Rio Segévia, Honduras).—ZELep6n, 
Anal. Mus. Nac. Costa Rica, 1887, 115 (Pacuare and Jiménez, Costa Rica).— 
SciaTER, Cat. Birds Brit. Mus., xv, 1890, 234 (Angostura, Costa Rica; Verd4- 
gua; Panam4; Bogoté; Remédios, Antioquia; Esmeraldas, Ecuadér).— 
Sanvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 210.—RicHMonp, 
Proc. U. S. Nat. Mus., xvi, 1893, 501 (Rio Escondido, Nicaragua).—(?) Saz- 
vapori and Festa, Boll. Mus. Zool., etc., Torino, xv, 1899, no. 362, 29 
(Foreste del Rio Peripa, w. Ecuadér; crit.).—Carrixer, Ann. Carnegie Mus., 
vi, 1910, 607 (Caribbean lowlands up to 1,500 ft., Costa Rica; habits; descr. 
nest and eggs). 
[Myrmotherula] fulviveniris ScuatER and Satvin, Nom. Av. Neotr., 1873, 71.— 
SHarpe, Hand-list, iii, 1901, 21, part. 
«Thirteen specimens. 
Locality. Wing. | Tail, | Cul | Tar- Middle 
MALES. 
Three adult males from Panamé... state nsec eee eee ee eer teense 49.8 33 15.2 16.7 10.8 
Ten adult males from Costa Rica...........2..-.222 2. eee ee eee 51 32.5 14.7 16.2 10.9 
FEMALES. 
Three adult females from Panam&........--.--.----.----+-+-+5- 49.5 33.3 14 16.7 10.8 
Ten adult males from Costa Rica (8), Nicaragua (1), and Hon- 
irs) (1) core tence desu e ae alieingeser dederia werasesasd 50.8] 344] 1471 166] 111 
dT have not seen a specimen from Ecuadér. 
