Species of the Genus Pipra. 43 



Typical locality. Barra do Rio Negro (Manaos), Lower 

 Amazons. 



Type. No. 15155, Mus. Vindob., « $» ad., Barra do Rio 

 Negro, 3 October, 1830 : coll, Natterer. 



" $" ad. (type of species: Mus. Vindob.). — Upper sur- 

 face pale olive-green; crown bright lemon-yellow, the extreme 

 tips of the feathers only being green. Wing-coverts, quills, 

 and tail-feathers dusky, externally margined with the colour 

 of the back. Sides of the head and neck dull greenish. 

 Under-parts pale yellowish, fore-neck and sides shaded with 

 pale greenish ; axillaries and under-wing-coverts pale yel- 

 lowish. Upper mandible and tip of the lower blackish 

 brown, base of the latter whitish. 



? ad. — Exactly like the male in colour and structure. 



This species is at once recognisable by the peculiar shape 

 of the two outer rectrices. The outermost pair is very narrow 

 and about 10 mm. shorter than the longest, with the shaft much 

 stiffened. The next pair agrees in the latter respect, but is 

 rather broader and much longer, being only about 2 mm. less 

 than the middle tail-feathers. This striking character, which 

 has been overlooked hitherto, is quite constant in eleven 

 specimens and is common to both sexes. 



Ten adults (of both sexes) from British Guiana agree with 

 the type in having a large yellow vertical spot, and differ only 

 by the slightly longer tail and larger bill. Some of them 

 have the crown-patch rather smaller and of a darker, more 

 golden yellow, but others are exactly like the type. Some- 

 times there are faint traces of pale greyish shaft-lines on the 

 throat. 



Measurements. 



Wing. Tail. Bill, 

 mm. mm. mm. 



1. S ad. Barra do Rio Negro. (Type of 



species.) 47 19 9 



2, 3. S <$ . Camacusa, Brit. Guiana 50, 50| 20 9$, 10 



4, 5. $ $ . Camacusa, „ 50 23, 24 9£, 10 



6. S ad. Rio Carimang, „ 51 2H 9| 



7. <$ ad. Bartica Grove, „ 47 22^ 9A 



8,9. $o. „ „ (Type 



of Tyvanneutes brachyurus Scl. 



& Salv.) 48, 50A 22, 23 9A-10 



