112 TYRANNISE. 



below pale cinereous ; throat white, broadly striated with black ; bill above 

 black, below pale : whole length 9-0 inches, wing 4-5, tail 4-3. Female similar. 



Hab. Eastern Argentina and Patagonia. 



This species, originally discovered by Darwin in Patagonia, is also 

 found in Eastern Argentina. White obtained it in Catamarca, Durn- 

 ford in Tucuman, and Burmeister on the Eio Quarto, in Cordova. 



110. AGEJOENIS MAKITIMA (d'Orb. et Lafr.). 

 (WHITE-TAILED TYRANT.) 



Agriornis maritima, Scl. et Salv. Nomencl. p. 41 ; Durnford, Ibis, 1873, p. 394 

 (Chupat); Harrows, Bull. Nutt. Orn. Cl. vol. viii. p. 137 (Sierra de la 

 Ventana). Agriornis leucurus, Burm. La-Plata Reise, ii. p. 459 

 (Mendoza). 



Description. Above cinereous ; secondaries edged externally and tipped with 

 white ; tail dark cinereous, the four external rectrices with the whole outer 

 webs and about the one-third apical part of the inner webs white, the median 

 rectrices tipped with white ; below paler cinereous ; throat greyish white, 

 slightly striated with dark cinereous ; lower belly, crissum, flanks, and under 

 wing-coverts white, more or less tinged with cinnamomeous ; bill and feet black : 

 whole length 9*0 inches, wing 5-3, tail 4-0. Female similar. 



Hab. Argentina, Patagonia, Chili, and Bolivia. 



This Agriornis was obtained by Durnford at Tombo Point in Central 

 Patagonia, by Burmeister in the Sierra de Uspallata, near Mendoza, 

 and by Barrows in the rocky gorges of the Sierra de la Ventana. 



Darwin tells us of this species that it " is a scarce, shy, solitary bird, 

 frequenting the valleys in whicli thickets grow, but often feeding on 

 the ground. In the interior plains of Patagonia, on the banks of the 

 Santa Cruz, I several times saw it chasing beetles on the wing, in a 

 peculiar manner, half hopping and half flying ; when thus employed it 

 spreads its tail, and the white feathers in it are displayed in a very con- 

 spicuous manner. I also met with the species in the lofty and arid 

 valleys on tne eastern side of the Cordillera of Central Chili, and like- 

 wise at Copiapo." (Zool. Voy. * Beagle/ iii. p. 57.) 



111. MYIOTHERETES RUFIVENTEJS (VieilU 

 (CHOCOLATE TYRANT.) 



Myiotheretes rufiventris, Scl et Salv. P. Z. S. 1868, pp. 138, 141 (Conchitas) ; 

 iid. Nomencl. p. 42 ; Durnford, Iliis, 1877, p. 175 (Buenos Ayres), et 1878, 

 p. 394 (Centr. Patagonia); White, P. Z. S. 1882, p. 603 (Buenos Ayres) ; 



