( ^H ) 



of the male. The foim which he now brought to notice was, 

 on the contrary, a direct and unmistakable mimic of Flanejna 

 jwggei ; and, as it was inconvenient to refer to the mimetic 

 forms without assigning names to them, he proposed to style 

 this form Planemo'ides. 



The President congiatulated Mr. Trimen on the exhibit, 

 and the special interest attaching to an interpretation of this 

 remarkable form of the female merope. The Society would 

 sympathize with the feelings of the author of the original 

 discovery brought before the scientific world, more than 

 thirty-five yeai-s ago, of the most remarkable of all examples 

 of mimicry in Rhopalocera, that of merope and its allies, 

 as he saw before him for the first time this mysterious 

 form accompanied by its model. At the same time it waa 

 only just to a younger worker, who had been in great part 

 guided by Mr. Trimen's classical monographs, to point out 

 that the interpretation so convincingly illustrated that evening 

 had been made out last spring by Mr. S. A. Neave, B.A., of 

 Magdalen College, Oxford, who had just become a Fellow of 

 their Society. Mr. Neave had exhibited this form of the 

 female merope together with Planema poggei as its model at 

 both soirees of the Royal Society in May and June, a time 

 when Mr. Trimen's absence from England unfortunately 

 prevented him from seeing them. Mr. Neave had shown 

 at the same time another most striking and interesting 

 member of the same group, a sjjecies of Elymnias, almost 

 certainly a form of E. p)hegea, Fabr. He had formed the 

 group in the course of an investigation into the bionomics of 

 a very fine set of butterflies from the north-eastern shores of 

 Lake Victoria Nyanza, presented to the Hope Department by 

 Mr. C. A. Wiggins. Still later Mr. Wiggins had captured 

 and presented further consignments, including a small but 

 very intei^esting set of specimens from Entebbe. Among the 

 later series, and especially that from Entebbe, Mr. Neave had 

 found additional members of the same group : — another 

 Acrjeine butterfly, viz. A. aurivillii, Stand., synaposematic 

 with the principal model, Planema j)oggei ; the Pseudacriva, 

 exhibited by Mr. Trimen, P. kiinoimi, Dewitz, var. ; and a 

 second probably undescribed species. All the above are 



