Todd — Studies in the Tyrannidce. 199 



Myiarchus cantans (not of von Pelzeln) von Berlepsch, Ibis, 1883, 140, in 



text (Bahia, Brazil). 

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



(Amazon records, ex Sclater). 

 Myarchus (lapsus) ferox Gceldi, Album Aves Amazonicas, 1906, pi. 35, 



fig. 2 (lower Amazon). 

 Myiarchus ferox ferox Ridgway, Bull. U. S. Nat. Mus., No. 50, IV, 1907, 

 612 (diag.; references).— Hellmayr, Nov. Zool., XVII, 1910, 301 (Cala- 

 ma, Rio Madeira, Brazil; von Pelzeln's records; crit.). — Hellmayr, 

 Abhand. K. Bayerischen Akad. Wiss., Math.-phys. Kl., XXVI, 1912. 

 109 (Fazenda Nazareth, Mexiana I., BrazU; crit.), 120 (Mexiana refer- 

 ences). — Oberholser, Proc. Indiana Acad. Sci., 1918, 304 (diag.; ref. 

 orig. descr.; meas.; range; crit.). 

 (?)Myiarchus ferox insulicola Hellmayr, Verh. Orn. Ges. Bayern, XII, 

 1915, 202 (Man-of-War Bay, Tobago; orig. descr.; type in coll. Munich 

 Mus.). — Oberholser, Proc. Indiana Acad. Sci., 1918, 305 (diag.; ref. 

 orig. descr.; crit.). 

 Myiarchus cephalotes (not of Taczanowski) Chapman, Bull. U. S. Nat. 

 Mus., No. 117, 1921, 98, part (Rio San Miguel, 4500 ft., Peru). 

 Description. — Above dark olive, the pileum darker and more sooty, the 

 rump rather paler; wings dusky brown, the greater and middle coverts 

 edged and tipped with dull buffy or grayish oUve, the inner primaries and 

 the secondaries margined externally with light buff, in gradually increasing 

 amount, and all the remiges with inner margins of dull buffy; upper tail- 

 coverts and tail dusky brown, with paler tip and external edgings of 

 brownish olive; sides of head neutral gray; throat and breast light neutral 

 gray; rest of under parts and under wing-coverts sulphur yellow; "iris 

 brown; bill and feet black." 



This description is based on specimens in absolutely fresh dress. Wear 

 affects the plumage greatly, dulling all the colors, the yellow below fading 

 greatly. In ju venal dress the colors are all duller, and the remiges and 

 rectrices are margined with Brussels brown. 



Measurements. — Male: wing, 87-92 (average, 89); tail, 84-91 (87.5); 

 bill, 18-20 (19); tarsus, 21-23 (22). Female: wing, 83-89 (86); taU, 

 82-92 (85); bill, 17.5-19 (18.5); tarsus, 21-23 (22). 



Range. — French and Dutch Guiana, southern Venezuela, and Amazonian 

 Colombia, south to eastern Peru, and east and south to Bahia, Brazil. 

 (Tobago?). 



Remarks. — Brisson gave a very full and accurate description of this form 

 in 1760, which became the chief basis for Gmelin's name ferox. This name 

 seems to have been correctly applied by most of the earlier authors, up to 

 1869 at least, when J. E. Gray placed it as a synonym of the tyrannulus 

 of Muller — a misidentification which was unfortunately followed by Coues in 

 1872, and has led to much confusion since. The late Count von Berlepsch 

 was the first to point out this mistake in 1883, while Sclater undertook to 

 restore the proper names to both forms in 1888, and to allocate the refer- 

 ences accordingly. Sclater, however, "lumped" all the races of this species 

 under one name, and his treatment is thus unsatisfactory. 



