1873.] MR. H. WHITELY ON PERUVIAN HUMMING-BIRDS. 187 



colour this species is exceedingly Yikefirthogonys viridis (Spix) ; but 

 the shape of its bill is more that of a Phcenicothraupis. 



25. Arremon silens (Bodd.). 



A skin obtained at Cosnipata agrees in every respect with this 

 species (with which we unite A. torquatus, the Brazilian form), 

 except in having the black collar imperfect in the middle, as in A. 

 semitorquatus. Before separating it specifically, we should wish to 

 see other specimens. 



40. Thamnophilus, sp. 



This is a female of a species of Thamnophilus unknown to us, 

 and probably new. It is of about the same size as Cymbilanius 

 lineatus, and very like the female of that species in colour ; but the 

 bill, although thick, is rather that of a true Thamnophilus. The 

 single specimen sent was "shot in the forest" in July 1871. 



45. Hapalocercus acutipennis, sp. nov. 



Supra olivaceus, alis caudaque fuscis, olivaceo limbatis : subtus 



flavus : remigibus quarto quinto et sexto apicibus acutis : cauda 



rotundata : rostro superiore nigra, inferiore corylino : pedibus 



nigris : long, tota 4*3, alee 1-9, caudce rectr. med. T8, ext. 1*5. 



Hab. Columbia int. (Mus. P. L. S.) : Peruvia alta (Whitely). 



Similis H.Jlaviventri, sed rostro debiliore et remigibus angustatis 



necnon capite olivaceo dignoscendas. 



Sclater has long had a Bogota skin of this singular species in his 

 collection, under the MS. name above given. Mr. Whitely's single 

 specimen, obtained at Cosnipata in June 1871, was "shot in the 

 clearing," and is marked male. 



We may mention that Arundinicola citreola, Landb., of Chili, is 

 certainlv not distinguishable from Hapalocercus fiaviventris (cf. 

 P. Z.S. 1867, p. 326). 



7. Notes on Humming-birds collected in High Peru. 

 By H. Whitely, C.M.Z.S * 



[Received December 17, 1872.] 

 1. Myrtis yarrelli (Bourc). 



September 1870. Huasampilla, alt. 10,000 feet, commencement 

 of the valleys of the eastern wood-region. — For some days I 

 was observing a pair of these birds, which came hovering about 

 the blossoms at the very top of a large tree of considerable ele- 

 vation. I fired several shots without success ; but one day getting 

 a clear shot, I fortunately succeeded in killing one of them, but, on 

 account of the dense underwood, it was with the greatest difficulty, 



* Specimens of all these species (except of the first, which Mr. Whitely sup- 

 poses to be Myrtis yarrelli) have been submitted to Mr. Gould for determination. 

 I have added the names at the head of each notice. — P. L. S. 



