Trans. Enf. Soc. Loud. tqo6. Plate XXV I. 

 ITirOMIIN.E. ,^j^^ ^^^ IIELICONIN.K 



Melinaa 1 inueme (7). 



Alfred Robinson, phot. 



All figures are \ of the natural size. 



Witherby & Co. 



Parallel transition from barred to black hind wing in an Ithomiine butterfly and its Heliconine 

 (Aliillerian) Mimic: from the Potaro River, British Guiana. 



