500 Mr. O. Salvin on Birds 



Roraima^ but is of similar form, flat-topped, with vertical 

 walls, and with a long sloping talus from the foot of the walls 

 to the savanna country below. It diff'ers from Roraima 

 in being wooded at the summit and in the foot-slope at one 

 part giving a comparatively easy access to the top. A further 

 difference is in the drainage of the summit. On Roraima 

 the water falls over the edge of the plateau, forming mag- 

 nificent cascades in the rainy season. On Twek-quay there 

 are no waterfalls, and the water drains off by a cavity of great 

 depth in the middle of the plateau.'' (Proc. R. G. S. 1886, 

 p. 453.) 



Though of much lower elevation than the forests of 

 the slopes of Roraima, the woods of the summit of Twek- 

 quay have yielded many, if not most, of the upland species of 

 birds hitherto only known from Roraima. We thus find in 

 the present collection Tardus roraimce, Microcerculus ustu- 

 latus, Basileuterus roraim(R, Setophaga castaneocapilla, Hylo- 

 pJiilus sclateri, CalHste ivMtlerji, Myiobius roraim<E, Chloro- 

 pipo uniformis, Lathria streptophora, Pipreola whitelyi, Synal- 

 laxis adusta, and Aidacorhamphus lohitelyanus. 



It is evident from this list that the bird-fauna of this 

 mountain is but an extension of that of Roraima, as, indeed, 

 a glance at the map would lead us to expect, it being a por- 

 tion of the same mountain system. The rest of the collec- 

 tion obtained on the lower grounds consists mainly of speci- 

 mens of species already recorded in the preceding list. The 

 additions are as follows : — 



1. EUCOMETIS OLEAGINEA, Sp. H. 



? . Oleaginea ; fronte, capitis lateribus et gula cinereis ; cor- 

 pore subtus medialiter aurantiaco-oleagineo; alis nigri- 

 canti-fuscis ; remigibus cinereo, secundariis oleagineo 

 extus limbatis ; cauda nigricanti-fusca; rostro corneo, 

 mandibula ad apicem paullo pallid] ore; pedibus plumbeis. " 

 Long, tota 7" 75, alse 3*5, caudce rectr. med. 3'5, rectr. 

 lat. 3'0, tarsi 1*1, rostri a rictu 08. 



Hab. Twek-quay Mountain, Carimang River, British 

 Guiana {Whitebj). 



Obs. E. cassini affinis^ sed rostro robusto, dorso toto olea- 



