[167.] MYIARCHUS FEROX (Gm.).
(FIERCE TYRANT.)
Myiarchus tyrannulus, Scl. et Salv. Nomencl. p. 52; Durnford, Ibis, 1878, p. 61 (Buenos Ayres); White, P. Z. S. 1882, p. 608 (Salta); Barrows, Bull. Nutt. Orn. Cl. vol. viii p. 202 (Entrerios). Myiarchus ferocior, Cab. J. f. O. 1883, p. 214 (Tucuman).
Description. —Above dark cinereous, more or less olivaceous; wings and tail blackish; wing-coverts and outer secondaries with more or less defined edgings of dirty white; beneath, throat and breast cinereous, abdomen and under wing-coverts sulphur-yellow; bill dark brown; feet blackish: whole length 7·0 inches, wing 3·6, tail 3·4. Female similar.
Hab. Southern Antilles, and South America down to Argentine Republic.
There has been great confusion between this species and M. tyrannulus, from which the present bird may be distinguished by the absence of the rufous edgings to the inner webs of the rectrices.
Examples of M. ferox are in the British Museum from Punta Lara (Durnford), Mendoza (Weisshaupt), and Buenos Ayres ([Haslehurst]).
[168.] MYIARCHUS ATRICEPS, Cab.
(BLACK-HEADED TYRANT.)
Myiarchus atriceps, Cab. J. f. O. 1883, p. 215.