( 1 ) 



nov. ; H. denshaviii, Aust. ; //. decora, Walk. ; //. hirta, Ric; 

 //, madans, Aust. ; H. similis, Ric. ; U. /usca, Aust. ; IT. 

 brunnescens, Ric. ; Chrysops briicei, Aust. ; C. centurionis, 

 Aust. ; C. distinctipennis, Aust. ; C. fionehris, Aust. 



Mr. G. A. K. Marshall observed that probably many of 

 the Fellows present would hardly realise the importance of 

 Mr. Neave's exhibit. Even amongst the English Tahanidae 

 by no means all the males were known, and this sex was 

 hitherto unknown in the large majority of the species then 

 exhibited. 



Mr. G. C. Champion and Mr. J. E. Collin iilso commented 

 on the value of Mr. Neave's discoveries, the latter observing 

 that, with the knowledge of the habits of the male Tabwmdae 

 now placed at their disposal, it would be a more hopeful task 

 to discover that sex in other species in which it was still 

 unknown. 



A Cluster op Ova of Gonepteryx rhamni. — Mr. R. M. 

 Prideaux brought for exhibition seventeen ova of G. rhaiani 

 found in a cluster at Brasted Chart, on April 28, on a shoot 

 of Rhamnus frangula, on a fairly large bush, whereon were 

 a few other ova, singly or two or three together ; but, close 

 by, were other bushes of R. frangida, on Avhich no ova at all 

 could be found. Some of these bvishes were in a more 

 advanced stage of leafage than the one shown. 



Mimicry in the Tropics chiefly characteristic of 

 Forest Areas. The Birds and Lizards of the Forest and 

 THE Open. — Professor Poulton said that he had long been 

 struck, especially in the collections of butterflies received from 

 Uganda and British East Africa, with the immense develop- 

 ment of mimicry in Lepidoptera from the forest as compared 

 with the open country. It was, in fact, quite rare to find 

 any examples of mimicry at all among the species that 

 frequent the open. A few examples wei'e known among the 

 woodland species, while a large proportion both of individuals 

 and of species were mimetic in the forests. It occurred to 

 him that probably this difference was to be accounted for by 

 the difference between the insect-eating animals in these two 

 types of locality, lizards being probably the great vei'tebrate 

 insect-eaters of the open, birds of the forest. When, there- 



