On Neiu Neotropical Birds. 363 



apical half of the inner web in true 8. frontalis. The 

 greyish-brown frontal band is broader and more greyish. 

 Also the wings and the tail are longer. 



Mr. C. Helhnayr has compared the type of 8. azarae 

 D'Orb. in the Paris Museum, and finds that it is not the 

 same as my 8. fuscipennis, but agrees with 8. griseiventris 

 Allen, of which I have received a large series from the 

 Western Yungas of Bolivia and the Marcapata district of 

 South-east Peru. The latter agrees with 8. frontalis in having 

 all the wing-feathers bordered externally with cinnamon- 

 rufous, but it is very dark cinereous beneath, and has a 

 very long tail "of a darker brown shade and a brighter- 

 cinnamon cap. 



22. Siptornis babbi Beri., Bull. B.O.C., vol. XVI., p. 99 

 (May 1906). 



8. 8. sordidae (Less.) dictae ex Chile affinis sed sane diversa, 

 superciliis latis ad capitis latera ductis necnon colli lateribus 

 griseis, nee brunnescentibus, corpore superiore magis griseo- 

 brunneo, nee fulvo-terreneo-brunneo, corpore subtus albescen- 

 tiore, nee griseo tincto, primariis in adultis pure griseo nee 

 brunneo marginatis, Cauda multo breviore, rectricibus mediis 

 apice semper rotundatis nee acuminatis, rostro, crassiore, bre- 

 viore magis curvato, minus recto, mandibula albescentiore. 

 c? S al. 64-60*, caud. 69^-64^, culm, llf-lli mm. 

 ? ? al. 634-59, caud. 66h-6U, culm. 11|-11| mm. 

 c? c^tars. 20-19 mm. 

 ? ? tars. 211-19 mm. 



Habitat : Argentina occ. (Cordova, La Soledad, Tucuman) . 



Typus: in Mus. H. v. B., ? ad. Cosquin, Cordova, 18 Juli, 

 1882. [E. W. White leg.] ^ ' 



I have had the above bird fro**^Tk>rdova in my collection 

 since 1883, and have always regarded it as belonging to an 

 undescribed species, but in default of material for comparison, 

 I have refrained from describing it. It was only lately that 

 I found a good series of this species in the Rothschild 

 Museum at Tring, containing three specimens also from 

 Cosquin, Cordova (coll. White), two specimens from La 

 Soledad (coll. C. B. Britton), and three from Tucuman, two 

 of them collected by M. Ci. A. Baer and one by L. Dinelli. 



