On Birds front British Guiana. 57 



The second addition to the Colombian avifauna is a specimen 

 of Oncostoma olivaceuni, Lawr. The genus Oncostoma has 

 hitherto been believed to be confined to Central America ; 

 the discovery of 0. olivaceuni at Bucararaanga therefore is a 

 fact of considerable interest. The skin sent from Bucara- 

 manga differs a little from a typical specimen of O. oliva- 

 ceuni kindly lent to me for comparison by Mr. Sclater. The 

 former is of much larger dimensions and has a somewhat 

 narrower bill ; the upper parts of tlie body are of a darker 

 olivaceous, especially on the top of the head, where the 

 dark basal markings of the feathers are more apparent. 

 Further, the upper breast is more conspicuously striated with 

 dusky, and the yellowish wing-bands (formed by the terminal 

 spots of the larger and middle wing-coverts) are much clearer 

 and broader. ; the legs, too, are darker. 



Knowiug that similar differences in size and colour are to 

 be found in specimens of the allied 0. cinereigulare , I do not 

 think the specimen from Bucaramanga ought to be separated 

 specifically or subspecifically from true O. olivaceuni. A 

 larger series is necessary to settle this point definitely. 



O. olivaceum from Panama (mus. P. L. Sclater) : al. 41^ 

 millim., caud. 30, rostr. 11^, tars. 144. 



0. olivaceum from Bucaramanga : al. 49 millim., caud. 38^, 

 rostr. 12^, tars. 14. 



The third addition to the avifauna of Bucaramanga is a 

 young inale in transition plumage of Euphonia nigricollis 

 (Vieill.), about which no remark is needed. 

 Muenden, November 1885. 



XI. — A List of the Birds obtained by Mr. Henry Whitely in 

 British Guiana. By Osbert Salvin^ M.A.^ F.R.S., &c. 



[Coutinued from ' The Ibis/ 1885, p. 439.] 



380. PiCUMNUS MINUTUS. 



Pipra minuta, Linn. Syst. Nat. i. p. 340 ? 



Picunmus minutus, Cab. in Schomb. Guiana, iii. p. 714. 



Camacusa, Merume Mountains, Roraima (3500-4000 ft.). 



