206 Proceedings of the Biological Society of Washington. 



Myiarchus cephalotes Taczanowski. 



{l)Myiarchusferox (not Muscicapaferox Gmelin) Tschudi, Arch. f. Naturg., 

 1844, 273 (Peru; excl. syn.). — Tschudi, Fauna Peruana, Aves, 1846, 153 

 (descr.). 



Myiarchus cephalotes Taczanowski, Proc. Zool. Soc. London, 1879, 671 

 (Paltaypampa, Ropaybamba, and Tambillo, Peru; orig. descr.; type in 

 coll. Warsaw Mus.; crit.; habits). — Reichenow and Schalow, Journ. 

 f. Orn., XXVIII, 1880, 317 (reprint orig. descr.). — Taczanowski, Proc. 

 Zool. Soc. London, 1882, 22 (Chirimoto and Tamiapampa, Peru).— 

 Taczanowski, Orn. Perou, II, 1884, 322 (Ropaybamba, Paltaypampa, 

 Tambillo, Chirimoto, and Tamiapampa, Peru; descr.; references; crit.; 

 habits). — Taczanowski and von Berlepsch, Proc. Zool. Soc. London. 

 1885, 93 (Machay, Ecuador).— Sclater, Cat. Birds Brit. Mus., XIV, 

 1888, 254 (Tamiapampa and Chirimoto, Peru; descr.; references). — 

 von Berlepsch and Stolzmann, Proc. Zool. Soc. London, 1896, 367 

 (La Merced and Garita del Sol, Peru). — Sharpe, Hand-List Birds, III, 

 1901, 145 (in list of species; range). — Ridgway, Bull. U. S. Nat. Mus., 

 No. 50, IV, 1907, 612, note (crit.).— von Berlepsch, Ornis, XIV, 1907, 

 477 (in list of species). — Brabourne and Chubb, Birds S. Am., I, 1912, 

 302 (ref. orig. descr.; range). — Chapman, Bull. Am. Mus. Nat. Hist., 

 XXXVI, 1917, 476 (Cerro Munchique, Miraflores, Salento, Santa 

 Elena, Rio Toche, El Eden, La Candela, and La Palma, Colombia; 

 Huanuco, Peru; local range; crit.). — Bangs and Noble, Auk, XXXV, 

 1918, 455 (Tabaconas, Peru). — Hellmayr, Arch. f. Naturg., LXXXV, 

 1920, 58 (Chaquimayo, Peru; range; crit.). — Chapman, Bull. U. S. Nat. 

 Mus., No. 117, 1921, 98, part (Prov. Hudnuco, Peru). 



Myiarchus swainsoni var. cephalotes Dubois, Syn. Avium, I, 1902, 250 

 (ref. orig. descr.; range). 



Description. — Above deep olive, the pileum usually darker and browner, 

 with obscure darker centers to the feathers; wings dusky brown, the middle 

 coverts tipped and the greater coverts edged and tipped with deep olive 

 buff; secondaries margined externally with pale chalcedony yellow, in 

 gradually increasing amount, becoming whitish on the inner secondaries 

 (tertiaries) ; upper tail-coverts and tail dusky brownish, with more or less 

 obvious olivaceous edgings; outer web of the outer rectrix conspicuously 

 paler, cartridge buff; sides of head neutral gray, passing into pallid neutral 

 gray on the throat and breast; rest of under surface and under wing-coverts 

 barium yellow; "iris dark brown; bill and feet black" (Taczanowski). 



Measurements. — Male: wing. 91-95 (average, 93); tail, 88-93 (91); 

 bill, 17.5-19 (18.5); tarsus, 20.5-22.5 (21.5). Female: wing, 86-91 

 (87.5); tail, 84-89 (86.5); bill, 16.5-18.5 (17.6); tarsus, 19.5-21.5 (20.7). 



Range. — Subtropical Zone of the Andean region, from Colombia to 

 Bolivia. 



Remarks. — This species is easily recognizable by the conspicuously paler, 

 buffy white outer web of the outer tail-feathers, in which respect it differs 

 from all the other South American forms except M. apicalis, which, how- 

 ever, is otherwise very different. It was described by Taczanowski in 1879 



