176 



The trachea in the male of this species differs from that of the last, in having only one enlarge- 

 ment on the tube (in other respects similar), and in the left bronchia being much larger than the 

 right. The comparatively smaller size of this bird at once distinguishes it from the preceding. 



MERGUS BRAZILIANUS. 



Met. — Niger, capite colloque viridi-eeneis. 



BRAZILIAN MERGANSER. 

 Black merganser, with the head and neck brassy green. 



IN. IN. IN. 



Length of bill 2 Tarsi If Middle toe 2 {, 



Merganser, with the head and neck glossy green ; the occiput with a long pendent crest the 

 same ; the whole of the back, tail, and wings sooty black ; wing spot white, divided by a black 

 streak ; under surface and the lower part of the neck brown, the latter, with the flanks, minutely 

 spotted and barred with white ; the abdomen broadly so ; bill black ; legs and feet orange, with 

 the webs dusky. 



Mergus Braxilianus Fail. Gal. des Oiseaux, 2. 209. 



Le Hark' a hint hrins Diet, d' His/. Nat. 2d edit. 14. 222. 



In the collection of the Zoological Society; evidently a young bird. 



