364 Hans Graf von Berlepsch : 



All these agree among 1 themselves in the characters indicated 

 above, and there can no longer be any doubt that it is quite 

 a distinct species, differing as it does from 8. sordida (Less.) 

 in having a distinct greyish superciliary stripe and greyish 

 sides to the neck, and also in having a more greyish-brown 

 instead of fulvous-brown upper surface, and much whiter, 

 instead of greyish, underparts. ■ The primaries have pure 

 grey outer margins, the middle rectrices are always 

 rounded, not acuminated, and last, but not least, the tail is 

 much shorter. The bill is also shorter and more curved, not 

 so straight and pointed. I have named this species in honour 

 of the successful explorer of Tucuman and Peru, M. Gr. A. 

 Baer, of Paris. 



23. Siptornis sordida affinis Beri., Bull. B.O.C., vol. 

 XVI., p. 98 (May 1906). 



8 . 8 '. sordidaeflavogularis (Gld.) dictae ex Patagonia orientali 

 valde affmis sed corpore supra obscuriore magis fumoso- 

 brunneo nee fulvescente tiiicto, corpore subtus clare cinereo- 

 albo nee brimnescenti cinereo, humeris dorso fere concoloribus 

 nee rufobrunneis, macula gulari rufocastaiiea nee fulva, necnon 

 alis longioribus distinguenda . 



Al. 67, caud. 86, culm. 12J, tars. 21 mm. 



Habitat : Tucuman. 



Typus: in Mus. H. v. B., S ad. Los Vascmez, 19 June 1903. 

 445 metres. [C. Lineili leg. No. 2708.] 



This is the true representative of 8. sordida of Chile in 

 Tucuman, agreeing with it in form (shape of bill etc.) and 

 in general style of coloration. In its dark coloration it 

 comes nearest to 8. s. flavogularis (Gld.) from Eastern 

 Patagonia, but has a still darker shade on the upper parts 

 without any fulvous tinge. The under parts are of a clearer 

 greyish-white, not so brownish as in the Patagonian repre- 

 sentative, and the gular spot is of an intense rufous-chestnut 

 instead of being clear fulvous. The wings are also a little 

 longer than in the allied forms, and the rufous-brown shade 

 on the shoulders is altogether wanting. 



24. Thripadectes bricenoi sp. n. 



Th. Th. flammulato (Eyton) forma rostri et coloribus 

 similis sed sane diversus : corpore subtus ochraceo plumis 



