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very superior to that of larvae, many of which I have found 

 drowned after a very few hours in water. Of course the 

 number of species experimented on by me is much too small 

 for a very wide generalization ; still it has been shown to be 

 a fact that several kinds of lepidopterous pupa;, fair samples, I 

 think they may be called, will survive submergence for many 

 days in water, and my figures show that just as large a pro- 

 portion survive many days of it as survive a single day. It 

 should perhaps be observed that the submergence of all the 

 pupa; tried was completed many weeks before the imago was 

 due to emerge, with the partial exception of the bilunaria tried 

 in 1904-5, a very few of which, kept in a cold, tireless rcom, 

 emerged before and during the term of experimentalism ;" it 

 does not follow that submergence would have been as harmless 

 after the pupa had got over its winter lethargy and was 

 moving towards emergence ; this might be tested by 

 experiments on short-lived summer pupa?." 



A discussion followed in which Mr. A. W. Bacot, Mr. 11. 

 Adkin, Professor E. B. Poulton and other Fellows participated. 



Mr. G. T. Bethune-Baker contributed " A Monograph of 

 the Genus Ogyris." 



Mr. H. A. Byatt, B.A., read a paper on " Pseudacrsna 

 poij<jei and Limnas chrysippus; the Numerical Proportion of 

 Mimic to Model." 



Wednesday, May 3rd, 1905. 

 Mr. F. Mermfield, President, in the Chair. 



Election of a Fellow. 



Mr. J. Butterworth, B.Sc, of "Connie," Eglinton Hill, 

 Plumstead, S.E., was elected a Fellow of the Society. 



Exhibitions, etc. 

 Mr. M. Jacoby exhibited a series of Xenarthra cervicornis, 

 Baly, from Ceylon, and drew attention to the curious structure 

 of the antennas of the 3 those of the $ being quite simple It 



