782 MR. P. L. SCLATER ON PERUVIAN BIRDS. f DeC. 2, 



canti-albo : rostro et pcdibus nigris ; long, tota 3 '5, alee 2, 



caudce 1*2. 

 Hab. Peruvia alta, Cosnipata (Whitely). 



Obs. Sp. affinis T. caloptero, ex iEquatoria *, sed dorso nigro dis- 

 tinguenda. 



23. Tyranniscus viridissimus, sp. nov. 



Tyranniscus gracilipes, Scl. et Salv. P. Z. S. 1873, p. 185 (err.). 

 Supra olivaceus, pileo concolori : alts nigris extus Jlavicante oli- 

 vaceo stride marginatis : caudafusca e.vtus olivaceo marginata : 

 subtus dilute flavida, ventre medio et tectricibus subalaribus 

 clarioribus : long, tota 4"5, ales 2, caudce 2. 

 Hab. Peruvia int. Cosnipata et Guadelupe (Whitely). 

 Obs. Aff. T. gracilipedi, sed pileo dorso concolori, crassitie paulo 

 majore et colore pectoris minus claro diversa. 



A single skin of this species, received in Mr. Whitely's sixth 

 collection, was assigned to T. gracilipes. The receipt of a second 

 example enables me to point out the differences satisfactorily. This 

 species must be added to the list given P. Z. S. 1871, p. 842. 



24. Myiobius aureiventris, sp. nov. 



Supra saturate olivaceo-viridis, dorso postico flavissimo : pileo 

 nigerrimo, macula verticali celata flava : fronte et loris albis : 

 lateribus capitis cinereis : gula alba cineraceo induta : pectore 

 olivaceo, ventre flavissimo : alis nigris, secundariorum marginibus 

 angustis externis et remigum omnium internis cum subalaribus 

 ru/escentibus : cauda tota casta/iea : rostro et pedibus nigris : 

 long, tota 4'8, alee 2*6, caudce 2. 

 Hab. Peruvia alta, Cosnipata (Whitely). 



Obs. Assimilis M. ornato ex Columbia et M. phaznicuro ex 

 ^Equatoria orientali, sed gula albicante et ventre flavissimo distin- 

 guenda. 



Dr. Cabanis has lately described a third of this section of the 

 genus Myiobius from Western Ecuador (M. stellatus, Cab. J. f. O. 

 1873, p. 158). This Peruvian form makes a fourth. 



27. Pipra CjERULEicapilla, Tsch. F. P. Aves, p. 145. 



Until recently I had followed other authorities in considering 

 Tschudi's bird the same as Pipra cyaneocapilla of Upper Amazonia, 

 Columbia, and Panama. But, as Tschudi says, the Peruvian species 

 is quite distinct, having a conspicuous blue rump like the head. I 

 first saw an example of the latter in Jelski's collection belonging to 

 the Warsaw Museum ; and Mr. "Whitely now sends a single skin, 

 obtained at Cosnipata (the only one he has seen), of the same 

 species. 



29. Cinclodes bifasciatus, Sclater, P. Z. S. 1858, p. 448. 



Upucerthia atacamensis, De Philippi, Reise i. d. Wiiste Atacama, 

 p. 162, pi. 3. 



* P. Z. S. 1857. p. 82. r l. cxxT. fig. 1. 



