AVES DENDROCOLAPTID/E. 773 



Geogyaphical Range. — Andes of southern Argentina and Patagonia. 

 Obtained at Rio Gallegos by the Princeton Expedition. 



According to Peters "this form is a common resident in northern Pata- 

 gonia — San Antonio, Huanuluan and Bariloche, and also south of Ma- 

 quinchas. It is very tit-like in its actions, gleaning actively among the 

 leaves and terminal twigs of the bushes, pausing a moment to give a 

 little chattering scolding note before flying to the next bush." (Bull. M. 

 C. Z. Ixv. no. 9, p. 315.) 



Leptasthenura platensis Reichenbach. 



Leptasthenura piatensis Reichenbach, Handbk. (1850) p. 160 (Rio de la 

 Plata). 



Description. — Similar to L. a. pallida in general color tone, light 

 streaks on head still paler, mainly buffy white ; tawny area of wing more 

 restricted ; tail feathers much broader, lighter and grayer, light terminal 

 areas on outer feathers vinaceous instead of gray or white. 



Geographical Range. — Argentina, Uruguay and recorded from Pata- 

 gonia. 



O. V. Aplin writes of its occurrence in Uruguay: "I used to see this 

 little long-tailed bird twisting about among the branchlets of a tala in 

 the monte or among the rocks, or in an acacia or other tree in the quinta, 

 uttering a series of sharp tit-like notes ; its habits and appearance (apart 

 from its color and elevated crest-feathers) are not unlike those of a long- 

 tailed tit." (O. V. Aplin, Ibis, p. 182, 1894.) 



Genus SIPTORNIS Reichenbach. 



Type. 

 Siptornis Reichenb. Handb. d. sp. Orn. p. 171 (1853) . S. slriaiicollis. 

 Geographical Range. — Central America and throughout South America 

 to Patagonia and the Straits of Magellan ; Tierra del Fuego and the Falk- 

 land Islands. 



Siptornis modesta (Eyton). 



Synallaxis modestus, Eyton, Jardine's Contr. Orn. 185 1, p. 159 (Bolivia?). 

 Description. — Adult female, 7664 P. U. O. C, Upper Rio Chico, Pata- 

 gonia, March 24, 1897. Total length, 5.37 inches; wing, 2.52; culmen, 

 .45; tail, 2.40; tarsus, .75. Above uniform grayish brown (wood brown 

 of Ridgway), wings edged with paler and a tawny bar across the second- 



