352 MESSRS. SCLATER AND SALVIN ON NEW [Apr. 4, 



1831, p. 618), appears to have been founded on an individual varia- 

 tion of D. aguti with white incisors; D. albida, Gray (Ann. Nat. 

 Hist. x. p. 264) is probably, as Mr. Sclater has suggested*, an 

 accidental variety of the Antillean Agouti which I have here referred 

 to D. cristata; and, finally, Mr. Waterhouse was no doubt correct 

 in regarding " D. leptura, Natterer" (Wagner, Schreb. Sang. iv. 

 p. 49) and D. exilis, Wagler (Isis, 1831, p. 619), as being merely 

 synonyms of D. acouchi. 



4. On new Species of Bolivian Birds. By P. L. Sclater, 

 M.A., Ph. D., F.R.S., and Osbert Salvin, M.A., F.R.S. 



[Received April 3, 1876.] 



(Plates XXX .-XXXIII.) 



The following new species of birds are founded on specimens con- 

 tained in a collection recently formed in Bolivia by Mr. C. Buckley. 

 Nearly the whole of this collection was made in the province of 

 Yungas, in a forest-clad spur of the Andes which extends in a north- 

 easterly direction between the Rio de la Paz and the Rio Coroico, 

 affluents of the Rio Beni and then of the great tributary of the 

 Amazon the Rio Madeira. Mr. Buckley's head quarters in this 

 district was a place called Tilotilo, a mere group of Ranchos not in- 

 dicated on any map. The country he explored included a great 

 range of elevation, extending from about 3000 feet to 120D0 feet 

 above the sea-level, and consequently considerable variation of climate 

 and vegetation, the rich forests so characteristic of the eastern slopes 

 of the Andes forming the chief feature. The collection, which con- 

 tains between 400 and 500 skins of about 194 species, has passed 

 into the hands of Messrs. Salvin and Godman. The following are 

 the species in it which we consider to be undescribed. 



1. Catharus mentalis, sp. now 



Supra saturate fumoso-brunneus unicofor, alis caudaque paulo 

 obscurioribus : subtus schistaceus medialiter dilutior, ventre 

 medio fere a/bo; mento et gula cum genis brunneo indutis: 

 rostro aurantiaco ; pedibus pallide corylinis : long, tola 65, 

 alee 3'3, caudce 3*2, tarsi 1*3, rostri 0'95. 



Hab. "Suape" prope "Tilotilo" prow Yungas, Bolivia. 



Obs. Similis C. fuscatro, sed mento brunnescente et colore cor- 

 poris superi fuscescentiore distinguendus. 



2. Basileuterus exjophrys, sp. nov. 



Supra olicaceo-viridis unicolor: superciliis latis et corpore subtus 

 fiavis : loris, pilco medio et regione oculari nigris : rostro nigro: 

 pedibus pallidis : long, tota 55, alee 2 7, caudce 2'6, tarsi 95, 



» P. Z. S. 1874, p. 666. 



