Hi l.l. hi i\ mi EUB1 II 01 I OMPAB i I r. i SOd] 001 , 



ti\rl\ identify n as belonging to the eastern Brazilian Form, and bence 

 adept the name tpbnden*. < )n account of Fading the t. pe is somewhat 

 browner than fresh specimens. 



We have not Been am authentic examples of tin- female of this form, 

 bul a specimen (A. M. V II. 13,674) marked "Brawl?," the dimen- 

 sions of which are too small for polyohopierus and rather large for 

 tristis, may possibly belong to this form. The measurements are: — 

 wing, 75.0; tail, 55:5; tarsus, L8.0; exposed culmen, I'M). 



i 



.'*. PaCHTRHAMPHUS P0LYCH0PTERU8 VARIEGATUS (Spix). 



Paekyrhynchus variegatus Spix, Av. Bras., 1825, 2, p. 31, pi. (3, fig. 3 (<? juv.) 



(No type-locality stated we designate [Jpper Amason, near Ponteboa). 



Ttpi lost — fide Bellmayr, Abh. K. Bayer, akad. wriss., 1906, 22, abt. :i, 



p. 606. 

 Pachyrhynchus niger Spix, A\. Bras., L826, 2, p. 33, pi. L5, fig. 1 i ' ad.) No 



type-locality stated — "Amasonas prope Fonteboa," designated by 



Berlepseh and Ilartert, Nov. zool., 1902, 9, p. 56). Type lost — fide 



Hellmayr, loc. n't., p. 669. 

 Pachyrhomphus nigriventris Sclater, Proc. Zool. boc. London, 1857, p. 76 (new 



name for Packyrhynchus niger Spix). 



Subspbcific characters. -Similar to Pachyrhamphu8 poLychopterus poly- 

 chopteru8 (Vieillot) of South Brazil, hut smaller, and even blacker, the adult 

 male having practically unmottled, black rump, under parts and under tail- 

 coverts. 



Measi ki mi \ts. — Male (two specimens) — wing, 73.0-75.5; tail, 



58.5-5G.5; tarsus, 18.0-18."); exposed culmen, 13.0-12.8. 



Range. — Northern Bolivia, Upper Amazon, northeastern Peru 

 (Hellmayr), eastern Ecuador (Hellmayr). 



Specimens examined. — Northern Bolivia: Lower Beni, 1 cf (not 

 typical). Western Brazil: Porto Velho, Rio Madeira, 1 im. cf. 

 Total, 2. 



Remarks. — It is by no means certain that a large series of speci- 

 mens from the Upper Amazon would not prove the identity of this 

 small dark form with the next, the darkest specimens of which quite 

 match the only adult male of P. p. variegatus ( = niger) we have seen. 

 For the present, however, we keep the two forms separate, more on 

 the authority of Hellmayr and other investigators, than on the evi- 

 dence presented by our own specimens. P. p. variegatus is the only 

 form of which we have not been able to examine sufficient material. 





