+Tænioptera suiriri+, _Burm. La-Plata Reise_, ii. p. 460 (Tucuman). +Empidagra suiriri+, _Scl. et Salv. Nomencl._ p. 49; _iid. P. Z. S._ 1869, p. 633 (Buenos Ayres); _Cab. J. f. O._ 1878, p. 197. +Pachyrhamphus albescens+, _Gould, Zool. Beagle_, iii. p. 50, t. xiv. (Buenos Ayres). _Description._--Above cinereous; wings and tail blackish, all the wing-coverts and outer secondaries broadly margined externally with white; outer web of outer tail-feathers white; outer edges of primaries and narrow ends of tail-feathers cinereous; below white, under wing-coverts pale yellowish white; bill and feet black: whole length 5·5 inches, wing 2·9, tail 2·5. _Hab._ Argentine Republic, Uruguay, Paraguay, and Bolivia. This species is stated by Prof. Burmeister to be found in Tucuman and Northern Argentina. It also occurs near Buenos Ayres, where Hudson obtained specimens for the Smithsonian Institution. 156. SUBLEGATUS GRISEOCULARIS, Sclater. (GREY-EYED TYRANT.) +Sublegatus griseocularis+, _Scl. et Salv. P. Z. S._ 1870, p. 17 (Mendoza). _Description._--Above cinereous; wings and tail dark ashy brown, margins of wing-coverts and outer secondaries whitish; below, throat and breast pale cinereous white; belly and under wing-coverts pale lemon-yellow; bill horn-colour; feet dark brown: whole length 5·0 inches, wing 2·8, tail 2·5. _Female_ similar. _Hab._ Southern Peru and Western Argentina. Specimens of this species were obtained by Weisshaupt near Mendoza. 157. RHYNCHOCYCLUS SULPHURESCENS (Spix). (SULPHURY TYRANT.) +Rhynchocyclus sulphurescens+, _Scl. et Salv. Nomencl._ p. 49; _White, P. Z. S._ 1882, p. 607 (Misiones). _Description._--Above olive-green, head washed with cinereous; lores and line round the eye whitish; wings blackish brown, margined with yellowish olive; tail dark brown, slightly edged with olive-green; below sulphur-yellow tinged with olivaceous, throat more greyish; middle of the belly rather brighter; under wing-coverts pale sulphur-yellow; bill horn-colour; feet brown: whole length 5·2 inches, wing 2·6, tail 2·5. _Female_ similar. _Hab._ S. America from Northern La Plata to Veragua. Of this very widely diffused species specimens were obtained by White, in June 1881, in the dense forests of Misiones. 158. PITANGUS BOLIVIANUS (Lafr.). (BIENTEVEO TYRANT.) +Pitangus bellicosus+, _Scl. et Salv. Nomencl._ p. 50; _Durnford, Ibis_, 1877, p. 178 (Buenos Ayres); _Gibson, Ibis_, 1880, p. 24 (Buenos Ayres); _White, P. Z. S._ 1882, p. 607 (Catamarca); _Barrows, Bull. Nutt. Orn. Cl._ vol. viii. p. 200 (Entrerios). +Saurophagus sulphuratus+, _Burm. La-Plata Reise_, ii. p. 452.