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



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

 tion of D. ayuti 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. Saug. 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. 



[Eeceived April 3, 1876.] 



(Plates XXX. -XXXI II.) 



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 Rauchos not in- 

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

 range of elevation, extending from about 3000 feet to 120UO 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. nov. 



Supra saturate fumoso-brunneus unicoJor, alis caudaque pnulo 

 obscurioribus : subtus schistaceus medialiter dilutior, ventre 

 medio fere albo ; mento et gida cum, genis brunneo indutis : 

 rostro aurantiaco ; pedibus pallide corrjlinis : long, to ta 6'5, 

 alcB 33, caudcE 3*2, tarsi r3, rostri 0'9o. 



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



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

 poris superi fuscescentiore distinguendus. 



2. Basileuterus euophrys, sp. nov. 



Supra olivaceo-viridls unicolor: superciliis latis et corpore subtus 

 flavis : loris, pileo medio et regione oculari nigris : rostro nigra: 

 pedibus pallidis : long, iota 55, alee 2 7, cauda 2'6, tarsiQ^a, 



* P.Z.S. 1874, p. 66.6. 



