_Description._--Above umber-brown, more or less rufescent; lores with a whitish spot; wings blackish, all the coverts broadly tipped with pale rufous, forming two transverse bars; outer margins of external secondaries of the same colour; tail brown, but not rufescent; beneath dirty cinereous white, throat and belly brighter, and with a yellowish tinge; under wing-coverts and inner margins of wing-feathers ochraceous; upper mandible dark brown, lower whitish; feet pale brown: whole length 5·0 inches, wing 2·6, tail 3·4. _Hab._ S.E. Brazil, Bolivia, and N. Argentina. This obscure species occurs in the northern wooded districts of Argentina. 164. CONTOPUS BRACHYRHYNCHUS, Cab. (SHORT-BILLED TYRANT.) +Contopus brachyrhynchus+, _Cab. J. f. O._ 1883, p. 214. _Description._--Above cinereous, lores whitish; wings and tail blackish, with slight whitish edgings to the wing-coverts and outer secondaries; beneath paler, whitish in the middle of the belly; flanks with a concealed white patch; bill above brown, beneath pale; feet black: whole length 7·0 inches, wing 4·0, tail 3·2. _Hab._ Northern Argentina. Herr Schulz, who discovered this species near Tucuman, tells us that it is a summer visitor, and is usually seen perched on the tops of the highest trees on the look-out for insects. 165. CONTOPUS BRACHYTARSUS, Scl. (SHORT-FOOTED TYRANT.) +Contopus brachytarsus+, _Scl. et Salv. Nomencl._ p. 52; _White, P. Z. S._ 1882, p. 608 (Salta). _Description._--Above dark plumbeous olive; crown darker, blackish; wings and tail blackish; the wing-coverts and outer secondaries more or less edged with whitish; beneath dirty white, clearer on the throat and middle of the belly, which latter has sometimes an olivaceous tinge; bill above blackish, beneath yellowish white; feet blackish; first primary shorter than the fifth: whole length 5·3 inches, wing 2·9, tail 2·5. _Female_ similar. _Hab._ Central and South America. White found this widely ranging Tyrant "not uncommon in the forests of Salta." 166. MYIARCHUS TYRANNULUS (Müll.). (RUSTY-TAILED TYRANT.) +Suiriri pardo y roxo+, _Azara, Apunt._ ii. p. 143. +Myiarchus erythrocercus+, _Scl. et Salv. Nomencl._ p. 52. _Description._--Above brownish cinereous, crown rather darker; wings blackish, primaries narrowly edged with rufous, secondaries and coverts more broadly with dirty white; tail blackish, all the lateral rectrices with the greater part of the inner web rufous, leaving only a narrow blackish border alongside the shaft; beneath, throat and breast pale cinereous; belly and under wing-coverts pale sulphur-yellow; inner margin of rectrices pale rufous; bill dark horn-colour; feet blackish: whole length 7·4 inches, wing 3·8, tail 3·2. _Female_ similar. _Hab._ South America down to Argentina.