774 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



aries and inner primaries ; a buffy white superciliary stripe ; tail darker 

 brown, each feather bordered with rufous, increasing in extent outward, 

 until this color occupies most of the short lateral feathers ; under surface 

 pale cinereous washed with buff, whiter on the throat, where there is a 

 pale rufous spot in the adult. 



Fig. 388. Siptornis modesta, cf . 7664. About one-half natural size. 



Geographical Range. — Bolivia, Chili and Argentina, into northern Pat- 

 agonia (Huanuluan and El Escorial — Peters). Found on the upper Rio 

 Chico in March. 



Siptornis sordida sordida (Lesson). 



Synallaxis sordida Lesson, Rev. Zool. 1839, p. 105 (Chili). 



Synallaxis brimnea Gould, Voy. Beagle, Birds, p. 78 (1841) (Port Desire). 



Descriptioti. — Adult male, 7696 P. U. O. C, February 20, 1898, Santa 

 Cruz, Patagonia. Total length, 6.15 inches; wing, 2.30; culmen, .40; 

 tail, 2.90; tarsus, .85. Similar to S. modesta but lower back rump and 

 wings tinged with tawny, especially the last ; tail with the two outermost 

 feathers entirely tawny and usually the third as well ; throat spot of adult 

 pale fulvous, lacking in the young. 



Geographical Range. — Chili and northwestern Patagonia (Bariloche — 

 Peters). Reported also from the Chupat Valley. 



