646 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



raciiair,andli'azu, Costa Rica: Jilewfields, Nicaraguaj. — ScLATEHandSALViN, 

 Proc. Zool. Soc. Lond., 1867, 279 (Blewfields, "Nicaragua). — Lawrence, 

 Ann. Lye. N. Y., ix, 1868, 115 (San Jos^, Barranca, and Grecia, Costa Rica). — 

 FiiAXTZius, Journ. fur Orn., 1869, 308 fCosta Rica).— Salvix, Ibis, 1872, 313 

 (Nicaragua). 



[Myiarchiis] nigncapillus Shakpe, Hand-list, iii, 1901, 146. 



Myiarchiis lawrencii var. nigricapilhis Ridgway, Am. .Tourn. Sci. and Arts. Doc, 

 1872, 455, part. 



Myiarchiis lawrencei nigricapillus Nutting and Ridc.way, Proc. U. S. Nat. Mus. 

 vi, Dec. 29, 1883, 384 (Sucuya, Nicaragua); vi, 1884,393 (Ometepc, Nica- 

 ragua). — Cherrie, Auk, ix, 1892, 251 (San Jose, Costa Rica). — Richmond, 

 Proc. U. S. Nat. Mus., xvi, 1893, 507 (Rio Escondido, Nicaragua). — Nelson, 

 Proc. Biol. Soc. Wash., xvii, 1904, 44 (monogr.). 



[Myiarchns tristis]Yar. nigncapillus Baird. Brewer, and Ridgway, Hist. N. Am. 

 Birds, ii, 1874, 333, part. 



MYIARCHUS LAWRENCEII BANGSI Nelson. 

 BANGS' FLYCATCHER. 



Similar to 2L I. nigricapiUus, but pileuni deep black, in abrupt and 

 conspicuous contrast with the decidedly greenish olive of back, etc., 

 and inner webs of rectrices usually without any rufescent or cinna- 

 momeous edging. 



Adult 7nale.— Length (skins), 154-168 (161); wing, 74-83.5 (79.8); 

 tail" 67.5-79 (69.5); exposed culmen, 16.5-18.5 (17.7); tarsus. 17-20 

 (18.9); middle toe, 10.5-12 (11).« 



AduU female. —Length, (skins), 14,5-153 (150); wing, 75-78 (76.2); 

 tail, 69-70 (69.5); exposed culmen, 16.5-18 (17); tarsus, 18-19.5 

 (19); middle toe, 10.5-11 (10.8).^ 



Northwestern Panama (Boquete) and eastern Costa Rica (Bonilla; 

 Juan Villas; Tucurriqui?)^ 



Myiarchiis nigricapillus (not of Cabanis) Salvin, Proc. Zool. Soc. Lond., 1867, 148 

 (Santa Fe de Veragua, Panama; crit.); 1870, 199 (Chitra, Panama).-: 

 Sclater, Cat. Birds Brit. Mus., xiv, 1888, 257, part (Chitra, Santa Fe de 



n Seven specimens. 

 b Three specimens. 



Locality 



MALES. 



One adult male from northern Panama (Boquete) . . 

 Si.x adult males from eastern Costa Rica 



FEMALES. 



One adult female from northern Panama (^Boquete) 

 Two adult females from eastern Costa Rica 



Ex- 

 posed 

 culmen. 



Tarsus 



I Middle 

 toe. 



c I have not seen specimens from Tucurriqui, but the locality is so close to Bonilla 

 and .Tuan Vinas that the specimens from tliere .'^hould bo the present form. 



