AVES TYRANNID^. 805 



wings with two distinct bars formed by pale buff tips to the coverts, auric- 

 ular region streaked with black and white and not solid blackish, yellow 

 of lower surface practically confined to the abdomen, upper breast nearly 

 white like the throat. 



Geographical Range. — Rio Negro district, Argentina. 



Anairetes flavirostris Sclater and Salvin. 



Ana;retes flavirostris'^zX^X^x and Salvin, P. Z. S. 1876, p. 355 (Tilotilo, 

 Bolivia). 



Description. — Adult, 4213, Acad. Nat. Sci. Phila., Bolivia. Total length, 

 4.25 inches ; wing, 1.90 ; culmen, .30; tail, 1.88; tarsus, .70. Upper parts 

 olive brown, tail and wings and slender elongated crest feathers blackish, 

 edging of wing feathers and broad edgings of greater and lesser coverts 

 whitish, as well as outer web of outermost tail feathers ; beneath white 

 becoming yellowish or buffy on abdomen, breast strongly streaked with 

 black, feet black, bill yellow with dusky tip, superciliaries white and frontal 

 feathers and those on the sides of the face mottled with white. 



Geographical Range. — Southern Bolivia and central Argentina to coast 

 of Patagonia (San Antonio — Peters). 



Does not occur in the region covered by Mr. Hatcher's party. 



Genus TACHURIS d'Orbigny and Lafresnaye. 



Type. 

 Tachuris d'Orb. et Lafr. Syn. Av. i. p. 55 (1837) ■ • ■ T. rubrigastra. 

 Geographical Range. — Central and western Peru ; Argentina, Chile 

 and northern Patagonia. Confined to the reed-beds of lagoons and 

 rivers. 



Tachuris rubrigastra rubrigastra (Vieillot). 



Sylvia rubrigastra Vieillot, Nov. Diet. d'Hist. Nat. xi. p. 277 (1817), based 



on "Tachuri rey " of Azara (Paraguay). 

 Regulns azarce Lichtenstein teste Nauman, Vog. Deutschl. iii. p. 966 



(1823). 

 Regnlns omnicolorVx&xWoi Gal. Ois. i. p. 271, pi. 166 (1825). 

 Regulns lyronensis J. E. Gray in Griffith's Anim. Kingd. ii. p. 42. 



Description. — Adult male, 8755 P. U. O. C, La Plata, December, 1897 

 (S. Pozzi Collection). Total length, 4.50 inches ; wing, 2.00 ; culmen, 

 (other specimen, .32) ; tail, 1.80; tarsus, .82. Above dark bronze green. 



