70 



blue under-surface and the peculiar pale straw-coloured nuchal patch 

 render this species easily distinguishable among its near allies, 

 between which and the birds known as Turquoise Tanagers {Calliste 

 brasiliensis, Jlaviventris, &c.), it seems to form a sort of connecting 

 link as regards colouring. 



The accompanying plate has been made from the only authentic 

 example of this Tanager which I have ever met with — the type also 

 of Tschudi's description — M. Coulon, the Director of the Collection 

 of Natural History of the Gymnasium at Neuchatel, where Von 

 Tschudi's collections are deposited, having most liberally allowed me 

 to convey it to Paris, for the purpose of submitting it to M. Oudart's 

 pencil. 



In Lord Derby's museum at Knowsley, I once saw a specimen from 

 Bridges' Bolivian collection, which I imagined to be referable to the 

 immature state of this Tanager, and in my " Synopsis Avium Tana- 

 grinarum " accordingly noted that collection as containing an ex- 

 ample of it. Mr. T. Moore, however, the Curator of the Derby 

 Museum as now at Liverpool, informs me that he has been unable 

 to find the specimen in the present state of the collection. 



