Todd — Studies in the Tyrannidcs. 211 



Remarks. — The first specimens of this form to be collected were referred 

 to M. nigriceps of Sclater, with which M. atriceps agrees well in color, but 

 is an obviously larger bird, as pointed out by Cabanis in the original de- 

 scription. Taczanowski's records from Peru all seem to pertain to atriceps 

 also, the description fitting exactly. Mr. Hellmayr has lately proposed to 

 make atriceps and tuberculifer conspecific, but after an extended comparison 

 of specimens we are satisfied that this arrangement does not correctly repre- 

 sent their real relationships. M. atriceps appears to be a Subtropical Zone 

 species, probably taking the place of tuberculifer at the higher altitudes, 

 with absolutely no indication of intergradation. It is very imperfectly 

 known, however, and additional data on its habits and distribution is much 

 to be desired. 



Specimens examined. — Peru: Santo Domingo, 6; Chelpes, Junin, 5; 

 Tabaconas, 2; Inca Mine, 1. Bolivia: Samaipata, 3; Mizque, 1. Argen- 

 tina: Tafi Viejo, Tucuman, 9; Las Pavas, Tucumdn, 1; San Pablo, Tucu- 

 man, 1. Total, 29. 



Myiarchus tuberculifer tricolor von Pelzeln. 



Myiarchus sp. Sclater and Salvin, Proc. Zool. Soc. London, 1867, 578 

 (Rio Tocantins, Brazil).— Gceldi, Bol. Mus. Paraense, I, 1896, 346 

 (Sclater and Salvin's record). 



Myiarchiis tricolor von Pelzeln, Orn. Bras., ii, 1869, 117, 182 (Rio Janeiro 

 and Sapitiba, Brazil; orig. descr.; types in coll. Vienna Mus.). — von 

 Berlepsch, Ibis, 1883, 140, in text (crit. on type). — Sclater, Cat. 

 Birds Brit. Mus., XIV, 1888, 259 (Rio Tocantins and Bahia, Brazil; 

 descr.; references; crit.). — Sharpe, Hand-List Birds, III, 1901, 146 (in 

 list of species; range). — von Berlepsch and Hartert, Nov. Zool., IX, 

 1902, 51, part (Sapitiba and Bahia, Brazil). — Hagmann, Bol. Mus. 

 Goeldi, IV, 1904, 89 (von Pelzeln's reference). — Snethlage, Journ. f. 

 Orn., LVI, 1908, 503 (Itaituba, Rio Tocantins, Brazil).— Penard, 

 Vogels Guyana, II, 1910, 262 (Guiana; descr.). — Brabourne and Chubb, 

 Birds S. Am., I, 1912, 303 (ref. orig. descr.; range). — Snethlage, Bol. 

 Mus. Goeldi, VIII, 1914, 389 (localities in lower "Amazonia"; descr.). 



Pyrocephalus tricolor Gray, Hand-List Birds, I, 1869, 363 (in list of species; 

 range) . 



Myiarchus nigriceps (not of Sclater, 1860) Sclater and Salvin, Nom. 

 Avium Neotrop., 1873, 52, part ("Amazonia," in range). — Menegaux, 

 Bull. Mus. d'Hist. Nat. Paris, 1904, 118 (I'Ouanary, French Guiana).— 

 RiDGWAY, Bull. U. S. Nat. Mus., No. 50, IV, 1907, 613, part, 650, part 

 (Guiana localities and records). 



Miyarchus (lapsus) tricolor Gceldi, Bol. Mus. Paraense, III, 1902, 293 

 (Rio Tocantins, ex Sclater). 



Myiarchus nigriceps var. tricolor Dubois, Syn. Avium, I, 1902, 251 (ref. 

 orig. descr.; range). 



Myiarchus tuberculifer (not Tyrannus tuberculifer D'Orbigny and Lafres- 

 naye) Hellmayr, Nov. Zool., XII, 1905, 293 (Igarape-Assu, Par^, 

 Brazil; crit.); XIII, 1906, 323, part (crit. on type, etc.). — von Ihering, 

 Aves do Brazil, 1907, 294, part (range). — Hellmayr, Proc. Zool. Soc. 



