( vii ) 



Lihythea cinyras to be a mimic, it too is a unique example in 

 its group. /Scdamis augustina is also a nearly equally rare 

 instance in the genus. 



A fascinating aspect of the mimicry in these islands is to be 

 found in the extraordinary effect of one of the most dominant 

 and distasteful types of the Oriental Region upon characteristic 

 Ethiopian forms. Ethiopian species of Amauris, Salaynis 

 and Pajnlio all exhibit the influence of Euplcea. It is most 

 unfortunate that the question was not studied many years ago 

 when the aspect of the country and the indigenous fauna were 

 comparatively unchanged. As Colonel Manders suggests, we 

 might then, in all probability, have attained to a precise 

 knowledge of the selective forces by which the approach has 

 been brought about. 



In conclusion, Professor Poulton desired again to thank 

 Colonel Manders for directing the attention of the Society to 

 the deeply interesting problems presented by the faunas of 

 these two islands ; and personally he wished to thank him for 

 much kind help both in information and material. He had 

 also been greatly indebted to Mr. Eoland Trimen, F.R.S., with 

 whom he had discussed the whole question, and from whom he 

 had received many valuable suggestions. 



Secondary Mimetic PtESEMBLANCE op lTHOMirN.E to the 

 Danaine genus Ituna. — Professor E. B. Poulton said that he 

 was indebted to the kindness of Mr. W. J. Kaye, F.E.S., for 

 the opportunity of exhibiting what seemed to him a very 

 intei'esting example of secondary mimicry. In 1898 he had 

 described and figured in the Zoological Journal of the 

 Linnsean Society (Vol. xxvi, p. 558) the great combination 

 of South American Lepidoptera which is ranged round the two 

 chief models Metliona confusa, Butl., and Thyridia psidii, L. 

 The combination included numbers of Ithomiinx belonging to 

 several genera, two species of Ituna (Danainee), one of Pierinae, 

 and many Heterocera belonging to the Castniidse and Perico- 

 pidse (Bypsidse). At the time when that paper was Avritten he 

 had no conception of the predominance of secondary resem- 

 blances between mimics, and had naturally failed to find what 

 he never looked for. However, a few weeks ago he saw in Mr. 

 Kaye's collection the specimens now being exhibited, and at 



