( li^ ) 



aurelut, on the t:ame slope if not actually overlapping in the 

 mountains about Susa, Piedmont. 



The Presidentj who also exhibited some forms of M. aurinia 

 taken by Mr. A. H. Hamm at Basingstoke and elsewhere, 

 and specimens of M. athalia, M. didyma, and 21. plimhe from 

 Asia Minor and Persia, continued the discussion, in which 

 Mr. M. Jacoby and other Fellows joined. 



The President inquired of any Fellow present whether it 

 was the case that the dead leaves upon the ground in tropical 

 countries tended to warp and curl in the dry season, but lay 

 flat in the wet. He suggested that the remarkable tendency 

 ill the dry phases of many species of butterflies, with dead- 

 leaf-like undersides, to develop an elongated and hooked 

 or bent apex to the fore-wing, and a greatly produced anal 

 angle to the hind-wing, might thus receive its interpretation. 

 The development certainly could not be explained by aflinity, 

 occurring as it did in the Nymphaline genera KaUinia and 

 Precis, the Satyrine genus Melanitis, and as Dr. Dixey has 

 recently shown in the Pierine genus. 



The PuESiDENT further stated that Mr. H. C Robinson had 

 informed him that it was certainly the case in northern 

 Australia that the dry-season dead leaves were warped and the 

 wet ones flattened. 



In reply Mr. W. J. Kaye stated that he had been in 

 Tr-inidad in the dry season, and noticed that the dead leaves 

 were curled and bent, whereas in British Guiana which he 

 visited in the wet season they were flat like damp blotting- 

 paper. 



Paper. 



The President gave an account of a paper by Mr. Abbott H. 

 Thayer on " Protective Coloration in its relation to Mimicry, 

 Common Warning Colour, and Sexual Selection," and made 

 comments thereon. 



Wednesday, November 4th, 1903. 



Professor E. B. Poulton, M.A., D.Sc, F.Pv.S., President, 

 in the Chair. 



