1880.] NEW BIRDS FROM ECUADOR. 1-57 



Obs. S. sibilatrici et iS. albogriseo affinis, ab illo uropygio albo 

 ab hoc tectricum alarum marginibus albo baud marginatis diversus. 



The receipt of specimens of the true S. albogriseus has shown us 

 that we were wrong iu attributing the Amazonian bird to that 

 species, from which it is readily distinguishable by the almost entire 

 absence of the broad white margins to the wiug-coverts. 



6. Myiochanes nigrescens, sp. nov. 



Contopus, sp. inc., Sclater, P. Z. S. 1858, p. 459. 



Myiochanes cinereus, Scl. Cat. Am. B. p. 232 (ex. b). 



TJnicolor cinereo-nigricans, pileo, alls et cauda paulo saturatioribus ; 

 rostro superiore nigra, in/eriore albicante ; pedibus nigris : long, 

 tota 4-4, al(B 2-2, caudce 2-2. 



Hab. Sarayacu, Ecuador (^Buckley). 



Mus. S.-G. et P. L. S. 



Obs. Sp. M. cinereo affinis, et ejusdem formae, sed colore nigri- 

 cantiore distincta. 



An imperfect example of this species has long been in Sclater' s 

 collection, obtained at Gualaquiza on the Kio Santiago, in 1858, by 

 Mr. Fraser. The receipt of additional and perfect skins enables us 

 now to characterize it as distinct from AI. cinereus, to which Sclater 

 referred it in his ' American Catalogue.' 



Fam. PiPRiD^. 



7. Heterocercus atjrantiivertex, sp. nov. 



Supra olivaceus, alis caudaque nigris olivaceo limbutis ; crista verti- 

 cali elongata aurantio-rubra ; subtus medialiter fulvus, latera- 

 liter in olivaceiim transeuns ; guln et colli lateribus albis ; capitis 

 lateribus cinereis ; subalaribus olivaceis, remigum et rectricum 

 pagina inferiore cineraceo-nigra ; rostro obscure corylino, pedibus 

 fuscis: long, tota 4-5, aim 3-4, caudce rectr. ext. I'O, med. 2*0, 

 tarsi{)'6, rostri a rictu 0"7. 

 Hab. Sarayacu, Ecuador (Buckley). 

 Mus. S.-G. et P. L. S. 



Obs. Species H. Jlavivertici proxima, sed crista aurantiaca nee 

 flava, et magis ampla, necnon colore corporis inferiore sane diversa. 



Three examples of this apparently new Heterocercus are in the 

 collection. Judging from its near ally, H.Jiavivertex of Pelzeln, of 

 which two species are in Sclater's collection, they are all males, as in 

 the females of the last-named species the coloured vertical crest is 

 wanting. 



The tail is of the same abnormal construction as in the two other 

 species of this genus. The feathers are rather stiifened and curve 

 outwards towards their extremities ; the three outer pairs of rectrices 

 are rapidly shortened and diminished in breadth, the outer pair only 

 measuring about 1 inch from their insertion. 



