150 Mr. Butler on some 



2. Mcchanitis trvncata. 



M. eagaensis var. 2. Bates, I.e. 

 Ega. B.M. 



This is a very small species, I do not think it a variety. 



3. Mechanitis pannifera, u, sp. 



Differs from M. Cf/aensis in having the postcellular spot of 

 primaries divided in the centre and edged internally by a sulphur 

 yellow expansion of the postmedian band ; the tawny sul:)apical 

 area replaced by an irregular sulphur yellow spot ; secondaries 

 with the median and marginal bands united into a large brown 

 patch which occupies the greater part of the wing. 



Obydos and Ega. B.M. 



4. Mechanitis plagigera^ n. sp 



Differs from M. egaensis in its much narrower lilack bauds 

 and smaller black spots, also in having only a small diffused 

 yellowish subapical spot instead of the cnirvod tawny and yellow 



Prainha, on the Amazons. B.M. 



PoLYMNiA group. 

 5. Mechanitis visenda, n. sp. 



Differs from M. pohjmnia in the much broader internal black 

 streak, absence of yellow patch across the end of the cell, and 

 presence of an ill-defined subapical yellow spot in primaries ; 

 secondaries with the central transverse black band double the 

 width, and the marginal black border narrower. 



Para and Tapajos. B.M. 



Genus IIeliconius, Fahricins. 

 G. Heliconius lativitta, n. sp. 



Allied to //. vesta, but with a broad oblique sulphur yellow 

 patch just beyond the cell of primaries, instead of the curved 

 yellow band and large discal spot of that species ; a small spot in 

 the end of the cell. 



Ega, Rio Jurua, Purus and Madeira, and Guayaquil. B.M. 



