Species of the Genus Pipra. 41 



pale bluish grey ; feet pale yellowish brown " (Natterer, MS.) . 

 In the dried skin the upper mandible is blackish, the lower 

 whitish, the feet flesh-coloured. Wing 50; tail 28; bill 

 9 mm. 



$ ad. (Mus. Vindob., Borba, February 9, 1830 ; Natterer 

 coll.). — Pileum dull bluish ; whole back bright grass-green, 

 the uropygial feathers with a slight bluish hue. Wing- and 

 tail-feathers dusky, exteriorly margined with yellowish green. 

 Sides of head and neck, throat, and chest dull greenish, rest 

 of under-parts clear yellow. Axillaries and under-wing- 

 coverts pale yellow. Upper mandible greyish black, lower 

 jaw bluish grey; feet pale yellowish grey. Wing 51; tail 

 27-28; bill 9 mm. 



The four specimens of this magnificent bird collected by 

 Natterer are still the only examples known. 



17. PlPKA OPALIZANS. 



Pipra opalizans Pelzeln,Zur Orn. Brasil.ii. (1868) pp. 128, 

 186, descr. orig. $ [Para]; Berlepsch, Ibis, 1898, p. 60, 

 tab. ii. ( $ ad.) [Ourem, Rio Guama] ; Heilmayr, Verhandl. 

 zool.-bot. Gesellsch. Wien, 1903, p. 201, descr. ? [Be- 

 mavides]; id. Nov. Zool. xii. 1905, p. 291. 



Habitat. Environs of Para, N. Brazil : Para (Natterer 

 coll.) ; Ourem on the Rio Guama (W. A. Schulz coll.) ; 

 Bemavides (Steere coll.) ; Igarape-Assu (A. Robert coll., 

 Mus. Tring). 



Typical locality. Para. 



Type lost. 



$ ad. (No. 2115, A. Robert coll., Igarape-Assu, Para, 

 April 19, 1901 : Mus. Tring) . — "Top of the head ornamented 

 by a plaque composed of flat metallic feathers of unsurpassed 

 beauty. They might be classed as being like mother-of-pearl 

 with a glittering hue of opal, but at the same time may be 

 observed a rich coruscation on it of the purest gold and 

 silver " *. Back bright grass-green, as are also the wing- 

 coverts, the outer webs of the quills, and the tail-feathers. 

 Inner webs of remiges and rectrices dusky except the central 

 pair of the latter, which are uniform green, a little paler than 



* I use the words of Count Berlepsch, as they describe the peculiar 

 colour of the head in the most exact manner. 



