Ixxxv 



following observations on a probable case of lieteromorpliism 

 in Aegeriidae which he had discovered in Mr. Joicey's collection. 

 The specimen in question was closely related to the genus 

 Trilocliana, Moore {Scoliomimas Butl.), but differed by its 

 narrower and more oval wings, its head narrower than the 

 prothorax, its small oval eyes, and in various details of its 

 j)alpi, legs and neuration. While he realised that apart from 

 apterous females no case was known in the Lepidoptera of so 

 many and such varied sexual distinctions, he still considered 

 that it was an extreme case of the inversion of secondary 

 sexual characters, since the females among these Aegeriidae 

 possess the following characteristics : strongly pectinated 

 antennae, broad head, large round eyes, a long cylindrical 

 abdomen, legs and the extremity of the abdomen clothed 

 with long hair, all of which in other Aegeriidae are character- 

 istics of the males. All three species of Trilocliana were 

 described from females, mistakenly supposed to be males in 

 consequence of the above-named characters, and it was logical 

 to suppose that the hitherto unknown males would show 

 inverse characteristics. The area of dispersion of these 

 Aegeriidae, as shown by the specimens in various collections, 

 corresponded with that of their Hymenopterous models. 

 The (unfortunately mutilated) specimen in Mr. Joicey's 

 collection probably belonged to a new local race of Trilochana 

 scolioides, Moore, hitherto known from Sikkim and Indo-China. 



The exhibitor illustrated the points he enumerated by 

 drawings shown by the epidiascope. 



Mr. DuERAMT gave other instances of males with simple and 

 females with pectinated antennae. 



Wednesday, December 1st, 1920. 



Comm. J. J. Walker, M.A., E.N., F.L.S., President, in 

 the Chair. 



Election of Fellows. 

 Messrs. Charles Edward Clarke, c/o G. Howes, Esq., 

 452, George Street, Dunedin, New Zealand ; Edwaud Wyllie 



