and axillaries brown, glossed with blue ; quills dusky brown below, paler along the edge of the 

 inner web. Total length 6 inches, culmen 035, wing 4"15, tail 3*1, tarsus - 4o. 



Adult female. Similar to the male in colour. Total length 5"5 inches, culmen 0'35, wing 4'1, tail 2'8, 

 tarsus 04. 



The following notes refer to the series of specimens in the British Museum : — 



Cayenne. Plumage dull and worn, almost bronzy, with the wings and tail in full moult (Sclater 

 Coll.). Another (Tweeddale Coll.) is in brighter plumage, apparently just emerging from the 

 moult, the long first primaries not yet replaced. A third male (Salvin-Godman Cull.) is also in 

 complete plumage, excepting as regards the long primaries and secondaries, which are not yet 

 moulted. 



British Guiana. Three males (wing 4'0-4"l) and a female (wing 4"1) from the Atapurau River 

 (H. Whitely), procured towards the end of January, are all in slightly worn plumage ; but in a pair 

 obtained by Whitely on the Merume Mountains, the male (wing 4-15) is in full bright plumage, 

 having apparently just completed its moult, while the female is still moulting the loug primaries. 

 The contrast between the bright plumage of the Merume specimens and the rather bronzed 

 appearance of those from the Atapurau River is very marked, and shows that the new feathering 

 is acquired by the beginning of July, and becomes much worn by the end of the following 

 January. 



Amazonia. An adult bird from the Rio Negro (A. R. Wallace) is in slightly worn plumage 

 (wing 4 - 05). An adult bird from Pebas (J. Hauxivell) is moulting the wings and tail. A young 

 bird from the Upper Ucayali (E. Bartlett) has a nearly square tail ; and an adult from Yurima- 

 guas, March (E. Bartlett), is also moulting the long primaries. 



Ecuador. An adult (Sclater Coll.) has the wing 39 inches, and a pair from the Copataza River 

 (C. Buckley) also both measure 3'9 inches in the wing, which is slightly less than in Guiana 

 examples. At Sarayacu Buckley also procured a nestling. 



Peru. A female from Chanchamayo (H. Whitely) is in decidedly worn plumage, and has the 

 wing 4 inches. It has a narrow white breast-band. 



Bolivia. Of three adult specimens procured by Buckley at Yuyo, two are moulting their 

 quills and tail-feathers. The third is in worn plumage, and has the wing 4 inches in length. A 

 very young bird was obtained byBuckley at Cangalli. 



We have gone somewhat into detail over the Museum series, in order to try and find out whether there 

 is any confirmation of the difference in the width of the white breast-band, which is undoubtedly 

 well-marked in the series in question. The broader breast-band, which we fancied (Cat. B. I. c.) to 

 be a sign of immaturity, seems rather to be characteristic of more southern birds ; and we should be 

 able to differentiate two races with well-defined ranges, were it not for the Chanchamayo speci- 

 men in the Sclater Collection, which has as narrow a breast-band as the Guiana skins. The 

 narrow breast-band, however, with this exception, is characteristic of the birds from Guiana and 

 the Rio Negro ; while those from Upper Amazonia, Ecuador, and Bolivia have all of them very 

 broad white bands. 



Hub. Guiana, Rio Negro district of Brazil, Upper Amazonia, Ecuador, Bolivia. 



The blue-black plumage with the white thighs and the white baud across the breast 

 render this species easy to recognize. It was first described from Cayenne, and is 



