210 Proceedings of the Biological Society of Washington. 



Myiarchus nigriceps (not of Sclater) Taczanowski, Proc. Zool. Soc. Lon- 

 don, 1874, 539 (Maraynioc, Paltaypampa, and Pumamarca, Peru); 

 1879, 235 (Tambillo, Peru). — Sclater and Salvin, Proc. Zool. Soc. 

 London, 1879, 616 (Tilotilo, Yungas, Bolivia; crit.). — Taczanowski, 

 Proc. Zool. Soc. London, 1880, 203 (Cutervo and Callacate, Peru); 1882, 

 22 (Huambo and Tamaipampa, Peru). — Taczanowski, Orn. Perou, II, 

 1884, 324, excl. syn. part (Peruvian localities and references; descr.; 

 habits). ^Salvin, Nov. Zool., II, 1895, 12 (Cajabamba and Malea, 

 Peru). 



Myiarchus atriceps Cabanis, Journ. f. Orn., XXXI, 1883, 215 (St. Xavier, 

 Tucumdn, Argentina [type-locality], and Chilpes, Peru; orig. descr.; 

 type in coll. Berlin Mus.). — Reichenow and Schalow, Journ. f. Orn., 

 XXXIV, 1886, 86 (reprint orig. descr.). — Sclater and Hudson, Argen- 

 tine Orn., I, 1888, 157 (descr.; range). — Sclater, Cat. Birds Brit. Mus., 

 XIV, 1888, 259 (Cachupata, Peru; Tilotilo, Bolivia; Tucumdn, Argen- 

 tina; diag.; references [part]; crit.). — Sharpe, Hand-List Birds, III, 

 1901, 146 (in list of species; range). — Lillo, An. Mus. Nac. Buenos Aires, 

 (3), I, 1902, 187 (Tapia, Tucumdn, Argentina). — Lillo, Rev. Letras y 

 Cien. Soc. (Tucumdn), 1905, p. 17 of reprint (Tafi Viejo and San Javier, 

 Tucumdn, Argentina). — von Berlepsch and Stolzmann, Ornis, XIII, 

 1905, 113 (Huaynapata, Peru).— Hellmayr, Nov. Zool., XIII, 1906, 

 324, in text (crit.).— von Berlepsch, Ornis, XIV, 1907, 477 (in list of 

 species). — Dabbene, An. Mus. Nac. Buenos Aires, (3), XI, 1910, 348 

 (Argentine range). — Brabourne and Chubb, Birds S. Am., I, 1912, 303 

 ref. orig. descr.; range). — Bangs and Noble, Auk, XXXV, 1918, 455 

 (Tabaconas, Peru).— Chapman, Bull. U. S. Nat. Mus., No. 117, 1921, 99 

 (Torontoy, Peru). 



Myiarchus nigriceps. Var. atriceps Dubois, Syn. Avium, I, 1902, 251 

 (references; range). 



Miyarchus [lapsus] atriceps Gceldi, Bol. Mus. Paraense, III, 1902, 293 

 (Yungas, Bolivia, ex Sclater). 



Myiarchus tuberculifer atriceps Hellmayr, Arch. f. Naturg., LXXXV, 

 1920, 59 (Chuhuasi [7000 ft.], Peru; Jujuy, Argentina; references; crit.). 



Description. — Above deep olive, with more or less of a grayish shade, 

 especially anteriorly; pileum subcrested, black, passing into dusky gray on 

 the sides of the head and thence into pale neutral gray on the throat and 

 upper breast, and this into the Martius yellow of the rest of the lower sur- 

 face (including the under wing-coverts) ; wings dusky black, the secondaries 

 and wing-coverts with grayish brown or buffy olive outer edgings and buffy 

 inner margins below; tail dusky, with outer margins of deep olive hke the 

 back, that on the outermost rectrix paler and more buffy; "iris brown; bill 

 and feet black." 



Measurements. — Male: wing, 86-93 (average, 90); tail, 80-91 (85); 

 bill, 17-19.5 (18.5); tarsus, 18.5-21 (20). Female: wing, 80-87 (85); tail, 

 75-82 (80); bill, 17-18.5 (17.5); tarsus, 18.5-20.5 (19.5). 



Range. — Andean region of Peru and western Bolivia, in the Subtropical 

 Zone, south to Tucumdn, Argentina. 



