728 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult ma^e.— Length (skins), 95-101 (99); wing, 45-47.5 (46.6); 

 tail, 38-41 (39.7); exposed culmen, 11-12 (11.5); tarsus, 15.5-16.6 

 (16.1); middle toe, 8.5-9.5 (8.8).« 



Adult female.— hength (skins), 90-100 (92.9); wing, 41.5-44 (43.1); 

 tail, 36.5-49.5 (38.8); exposed culmen, 11.5-12 (11.8); tarsus, 15-17 

 (16.2); middle toe, 8.5-9 (8.8).'' 



Isthmus of Panama (line of Panama Railroad) to Guatemala (Chisec). 



Polioptila superciliaris Lawkence, Ann. Lye. Nat. Hist. N. Y., vii, June, 1861, 

 304, 322 (Lion Hill, Panama R. E.; coll. G. N. Lawrence); viii, 1865, 179 

 (Greytown, Nicaragua); ix, 1868, 92 (Angostura, Atiro, and Guiatil, Costa 

 Eica). — Baibd, Eeview Am. Birds, 1864, 71 (Isthmus of Panama). — Sclatee 

 and Salvin, Proc. Zool. Soc. Lond., 1864, 344 (Panama; crit.). — Salvin, 

 Ibis, 1866, 190 (Chisec, Guatemala); (?) Proc. Zool. Soc. Lond., 1870, 182 

 (Veragua). 



[Polioptila] superciliaris Gbay, Hand-list, i, 1869, 237, no. 3436. 



Polioptila bilineata (not Oulicivora bilineata Bonaparte 7) Boucaed, Ois. Guat. , 1878, 

 29 (Guatemala); (?) Proc. Zool. Soc. Lond., 1883, 439 (Progreso, Yucatan).— 

 Salvin and Godman, Biol. Centr.-Am., Aves, i, 1879, 52, part (Chisec, 

 Guatemala; La Union, Salvador; Punta Arenas, Turrialba, Angostura, Atirro, 

 and Guaitil, Costa Eica; Lion Hill, Panama E. E. ). — Nutting, Proc. U. S. 

 Nat. Mus., V, 1882, 387 (La PalmadeNicoya, Costa Eica); vi, 1883, 380, part 

 (Sucuy^ Nicaragua). — Zeledon, Cat. Aves de Costa Eica, 1882, 2; Proc. 

 U. S. Nat. Mus., viii, 1885, 105; Anal. Mus. Nac. Costa Eica, i, 1887, 105 

 (Angostura, Costa Eica). — Eidgway, Proc. V. S. Nat. Mus., v, 1882, 387 (crit.) ; 

 X, 1888, 585 (Segovia E., Honduras). — Shakpb, Cat. Birds Brit. Mus., x, 1885, 

 452, part ( Chisec, ""Guatemala; Turrialba and Punta Arenas, Costa Eica; 

 Bugaba, Chiriqui; Panama, Lion Hill, andChepo, Isthmus Panama). — Eich- 

 MOND, Proc. U. S. Nat. Mus., xvi, 1893, 482 (Eio Escondido and Greytown, 

 Nicaragua).— Cheeeie, Expl. Zool., Merid. Costa Eica, 1893, 3 (Boruca, T6r- 

 raba, and Buenos Aires, s. w. Costa Eica). 



[Polioptila'] bilineata Sclatbr and Salvin, Nom. A v. Neotr., 1873, 4. 



Ploliopiila] bilineata Eidgway, Proc. U. S. Nat. Mus., v, 1882, 387, 388, 389 

 (Panama; Veragua; Costa Eica; Nicaragua; Guatemala; "Venezuela");" 

 Man. N. Am. Birds, 1887, 570.— Hellmayr, Novit. Zool., vii, 1900, 536, in 

 text; viii, 1901, 360 (crit.); Tierreich, 18 Lief., 1903, 27, part. 



POLIOPTILA SUPERCILIARIS MAGNA Ridgway. 

 CARTAGO GNAIOATCHER. 



Similar to P. s. swperciliosa, but decidedly larger (except length of 

 tarsus); the wing much longer; coloration darker; the pileum in 

 adult female nearly slate-black, the under parts pale gray (between 

 french gray and pale cinereous), only the abdomen, hinder flanks, 

 anal region, and under tail-coverts being white. 



« Seven specimens. 



6 Ten specimens. 



"The supposed Venezuelan specimen is probably from the Isthmus of Panama. 



