63 



must be carefully distinguished from the better-known place of the same name on the Ucayali. 

 It has also been transmitted from the Rio Napo (see P. Z. S. 1854, p. 110). Tschudi, in his 

 ' Fauna Peruana,' mentions its occurrence in Eastern Peru without giving any details as to the 

 exact locality in which he found it. 



Except as regards the slight deviation in the colours of the soft parts mentioned by Natterer, 

 there would seem to be no external difference in the sexes of this Bucco. Above, the general 

 plumage is of a bright ferruginous brown, regularly banded across, except on the sides of the 

 head, with narrow black bars. This colour embraces the secondaries and the tail-feathers, in 

 which, however, the bars are further apart. A broad black collar crosses the upper back, and is 

 continued below across the chest. The throat is pure white, the abdomen pale fulvous, which 

 grows darker on the flanks and the under tail-coverts. The remiges are greyish black, margined 

 at the base of their inner webs with pale fulvous like the under wing-coverts. The bill, in 

 the dried skin, is orange-red, with the apex and culmen passing into dark horn-colour ; the feet 

 are brown. 



There is no other species of Bucco that at all resembles the present species in colour. 



The specimens of Bucco collaris in my collection and that of Messrs. Salvin and Godmaii, 

 and their dimensions, are as follows: — 



No. Sex. Mus. Patria. 



1. inc. P. L. S. Cayenne. 



2. 2 S.-G. Marabitanas, Rio Negro (iVa^^erer) . 



3. ? S.-G. Chyavetas, E.Peru (5artfe^if). 



4. $ P. L. S. Yquitos E. Peru {JVIiitely). 



5. $ P. L. S. Loreto-yacu, E. Peru (i?fl!M«'^<;e//) . 



6. inc. S.-G. Sarayacu, Ecuador {Buckley). 



The figure (Plate XIX.) is taken from No. 4. 



ig. tota, 



alae, 



caudse, 



rostn 



6-7 



3-1 



2-4 



1-4 



7-0 



3-2 



2-6 



1-4 



7-5 



3-5 



2-6 



]-6 



6-8 



3-3 



2-6 



1-4 



7-0 



3-2 



2-3 



1-4 



6-5 



31 



2-2 



1-4 



k2 



