GALBULA CHALCOTHORAX. 



THE BRONZY-CHESTED JACAMAR. 

 PLATE X. 



Galbula chalcotJiorax, Scl. P. Z. S. 1854, p. 110. 



Galhula clialcothorax, Scl. P. Z, S. 1855, p. 14. 



Galbula leucogaster, Scl. P. Z. S. 1858, p. 61. 



Caucalias clialcothorax, Cab. et Hein. Mus. Hein. iv. p. 218 (1863). 



Galhula leucogastra, Scl. et Salv. P. Z. S. 1867, p. 978. 



Galhula chalcotliorax, Scl. et Salv. Nomencl. p. 105 (1873). 



Galhula leucogastra, Tacz. P. Z. S. 1874, p. 548. 



Supril seneo-viridis purpurascente cupreo lavata^ pileo cserulescenti-viridi ; alis nigris, tectricibus et secundariis 

 extus dorso concoloribus ; subtus mento late nigro ; pectore toto purpurascenti-cupreo ; gutturis plaga 

 magna quadratd et ventre toto necnon remigum marginibus internis albis ; cauda supra seneo-viridi, 

 subtus cineraceo-nigr&j rectricibus lateralibus albo anguste terminatis et in pogonio interno eodem colore 

 limbatis; rostro et pedibus nigris : long, tota 8'5, alse 3*3^ caudse 3'8, rostri a rictu V7. Fern, mari 

 similisj sed gutture et ventre ochraceis. 



Hab. in Amazonia superiore. 



Obs. Similis G. leucogastrcs, sed crassitie majore et colore dorsi et pectoris diversa. 



In the present bird we have another instance of a Guianan species being replaced in Upper 

 Amazonia by a larger and more highly developed form, just as has been previously spoken of in 

 the case of JJrogalha amazonum. The difficulty in such cases is to decide vs^hether it is better 

 to recognize the form as specifically distinct or not. Different writers will take different views on 

 these questions ; and even the same writer is liable to alter his opinion upon such a point from 

 time to time. 



Galhula clialcothorax was first described as an independent species in a paper which I read 

 before the Zoological Society of London in 1854, upon a collection of birds received by 

 Mr. Gould from the province of Quixos, in Eastern Ecuador. In some subsequent communi- 

 cations to the Zoological Society upon Upper-Amazonian birds, Mr. Salvin and I did not 

 distinguish this bird from G. leucogastra. But shortly before the publication of our ' Nomcn- 

 clator Avium Neotropicalium ' we had convinced ourselves, after the examination of fresh 

 specimens, that the form was entitled to specific distinction ; and we accordingly gave it a place 

 in that work. 



In the fourth part of the ' Museum Heinianum ' Messrs. Cabanis and Heine arranged this 

 bird quite correctly as a second species of their genus Caucalias ; but they do not appear to have 

 met with examples of it. 



