69 



WEDNESDAY, August yin, lo a.m. 



GENERAL MEETING. 



President: J. H. Comstock. 

 Vice-President : The Hon. \V. Rothschild. 

 Secretary: H. Eltrixgham. 



The Secretary having made certain announcements, the 

 President, in opening the meeting, said that as they had a very 

 long programme for that morning, he would not weary them 

 with extended remarks introducing the speakers, but would 

 merely say that he was sure the members of the Congress were 

 looking forward with much interest to the hearing of the papers ; 

 and that as each of the papers treated of evolution, it seemed 

 very appropriate that they should be presented beneath that roof, 

 where one of the greatest battles in that war of opinions which 

 broke forth on the promulgation of the theory of evolution was 

 fought, and where the honoured President of that Congress 

 was doing so much to extend the bounds of the territory that 

 was won by that conquest. 



He had the honour to introduce Prof, van Bemmelex, 

 who would speak on " The Phylogenetic Significance of the 

 Development of the Butterfly ^^'ing." 



J. VAX Bemmelen made reference to a previous paper in 

 which it was shown that there is a pupal wing-pattern inde- 

 pendent of, but subsequently absorbed by, the imaginai pattern. 

 Subsequent work in wing-development b}- other authors. The 

 order in time of the developmental stages of the wings. Observa- 

 tions in the coloration of pup;e at the time of ecdysis. Description 

 of the wing-sheath of V. urticœ. Comparison of the pupal sheath 

 of V. urticœ with that of V. io. The wing sheath of Papilion- 

 idce. The wing-sheath pattern of P. machaon resembles that of 

 Thais polyxena. Wing-sheath pattern hi Picridce. Develop- 

 ment of the primitive wing-pattern. In Vancssidœ. In Picridu- 

 and Papilionidce. Primitive wing patterns exhibited in the 



