2 Mv.C.Chnhh: Notes on [Ibis, 



synonym of E. p. platensis ; but after a careful compaiisou 

 I have come to the conclusion that it differs sufficiently from 

 that species to be allowed the status of a subspecific form. 



I have, however, suggested a further division by the 

 sepai'ation of the Paraguay and Rio Parana birds, the 

 details of which are given below. With this the broad 

 striped group ends, and is followed by an intermediate or 

 narrow striped form, which is represented by two species, 

 viz. : Tanagra dumetorum Lesson, 1831, and Emhernagra 

 hngicauda Strickland, 1814. 



The remaining group is the uniform or unstriped one, 

 and consists oiE. olivascens d'Orbigny, which was described 

 in 1836, to which I propose to add E. gossei, n. sp. 



These notes ate based on material that has hitherto been 

 regarded by authors as consisting of two species only, 

 divided by the striped or uniform upper surface. Tlie former, 

 or striped bird, was known as Embernagra platensis (Gmelin), 

 and the latter, or uniform bird, as Embernagra olivascens 

 d'Orbigny. All other details relating to either appear to 

 have been ignored and, consequently, many facts are ob- 

 scure, as further research has proved : the most obvious 

 one being that E. longicauda of Strickland has for many 

 years been placed as a synonym of E. olivascens d'Orbigny, 

 whilst it is a perfectly distinct species and must now be 

 re-established and remain as such. 



I have to thank the authorities of the University Museum 

 of Zoology at Cambridge for sending the bird, that Strick- 

 land described, to the British Mnseum for comparison; also 

 JNIr. Tom Iredale, for his valnable help in regard to the 

 literature. 



Key to the Species. 



A. Back broadly lined with black. 



a. Upper surface yelloAvish green ; buii 

 on under surface extended over the 

 abdomen. 

 a' . Abdomen and flanks uniform buff. E. platensis platensis, p. 3. 

 b' . Abdomen whitish in contrast to 



the dark colour on the flanks . . U. platensis poHocephala, 



[P- 4. 



