204 Proceedings of the Biological Society of Washington. 



Pyrocephalus venezuelensis Gray, Hand-List Birds, I, 1869, 363 (in list of 

 species; range). 



Myiarchus tyrannulus (not Miiscicapa tyrannulus Miiller) Coues, Proc. 

 Acad. Nat. Sci. Philadelphia, 1872, 71, part (Venezuela; crit. on type). — 

 Heine and Reichenow, Nom. Mus. Heineani Orn., 1890, 146 (Vene- 

 zuela). — Salvin, Ibis, 1885, 298 (Bartica Grove and Camacusa, British 

 Guiana). 



Myiarchus ferox venezuelensis von Berlepsch and Hartert, Nov. Zool., 

 IX, 1902, 51 (Altagracia, Caicara, Perico, and Ciudad Bolivar, Vene- 

 zuela). — VON Berlepsch, Ornis, XIV, 1907, 477 (in list of species). — 

 Stone, Proc. Acad. Nat. Sci. Philadelphia, 1913, 205 (Boca Uracoa and 

 Jocopita, Manimo River, Venezuela). — ^Cherrie, Mus. Brooklyn Inst. 

 Sci. Bull., II, 1916, 244 (Ciudad Bolivar and Caicara, Venezuela). — 

 Oberholser, Proc. Indiana Acad. Sci., 1918, 305 (diag. ; range; crit.). 



Myiarchus (ferox) venezuelensis Chapman, Bull. Am. Mus. Nat. Hist., 

 XXXVI, 1917, 475 (Villavicencio, La Morelia, and Florencia, Colombia). 



Subspecific characters. — Similar to Myiarchus ferox ferox, but slightly 

 duller and paler, the upper parts dull brownish olive, the wings and tail 

 rather paler brown, the margins also paler. 



Measurements. — Male: wing, 86-93 (average, 89); tail, 84-90 (86.5); 

 bill, 18-20.5 (19); tarsus, 20.5-23 (22). Female: wing, 84-88 (86); tail, 

 80-85 (83); bill, 18-20 (19); tarsus, 19-23 (21.8). 



Range. — British Guiana and Venezuela, and west to the Andes in 

 Colombia. 



Remarks. — When Lawrence described his Myiarchus venezuelensis he 

 had no specimens of what is now called ferox before him, and compared his 

 bird with the type and other examples of panamensis, from which it is 

 readily distinguishable by its deeper coloration. The rufous margins of 

 the tail-feathers, however, to which Lawrence alludes, are merely a sign 

 of immaturity. Coues in 1872, with the types of both forms before him, 

 relegated both panamensis and venezuelensis to synonymy without hesita- 

 tion, but with the much greater and better material now available we find 

 that the latter is a slightly differentiated race, recognizable by the charac- 

 ters specified above, which hold good throughout the series when com- 

 pared with ferox. A considerable proportion of the specimens examined 

 have more or less conspicuous cinnamon edgings to the wings and tail, 

 indicating immaturity. British Guiana birds are intermediate, but are 

 perhaps best referred here, as are also specimens coming from near the 

 eastern base of the Andes in Colombia, in the Orinoco drainage. 



Specimens examined. — British Guiana: Bartica Grove, 1. Venezuela: 

 Boca Uracoa, 1; Jocopita, 1; Maripa, 6; La Lajita, 1; Rio Mato, 3; San 

 Felix, 1; El Callao, 2; Altagracia, 1; El Hacha, 1; Ciudad Bolivar, 2; 

 Caicara, 4; Sacupana, 1; La Union, 1; Las Trincheras, 1; Puerto La Cruz, 

 1; unspecified, 2. Colombia: Villavicencio, 4. Total, 34. 



Myiarchus ferox panamensis Lawrence. 

 Myiarchus tyrannulus (not Muscicapa tyrannulus Muller) Coues, Proc. 

 Acad. Nat. Sci. Philadelphia, 1872, 71, part (Panama and New Granada; 



