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viev/ from which I was incHned to dissent at the time, on the 

 ground that the orange and red pigments were not identical. 

 I could not then explain the orange patch in G. cleopatra, on 

 other grounds, however, and was obliged to let the matter 

 rest. I am now convinced that G. cleopatra arose as a seasonal 

 variation, thereby differing from the aberrations of Zygcsna 

 and its allies, which certainly do not arise in that way. 



An American species of Colias, the C. eurytheme oi Boisduval, 

 which is generally distributed throughout the States, has on 

 the forewings an orange patch on a yellow ground, precisely 

 similar to that of G. cleopatra. There is, however, a seasonal 

 form keewaydin, Edwards., which emerges from pups which 

 have hybernated, and has the orange patch much reduced, in 

 some specimens being almost or entirely suppressed. Now 

 the seasons in America are very marked, the difference being 

 much greater than in Europe, hence the summer and winter 

 types must necessarily alternate ; but supposing that the 

 climate of America was to become much more uniform, the 

 northern States uniformly cold, the southern ones uniformly 

 warm, what would happen ? Is it not obvious that the winter 

 form of Colias eurytJieine, with a much reduced orange patch, 

 would be perpetuated in the north, while the summer form 

 would be prevalent in the south — thus producing species (for 

 so they would then be called) exactly analogous to Gonepteryx 

 cleopatra and rhamni} Many things point to the fact that the 

 seasons were once extremely marked in Europe ; and I have 

 no hesitation in saying that in those old days Gonepteryx 

 rhanini and cleopatra were but seasonal forms of one and the 

 same species. 



Mr. John T. Carrington read a paper "British Salmonidae 

 and their Culture." 



MARCH 22nd, 1888. 



T. R. BiLLUPS, Esq., F.E.S., President, in the Chair. 



Messrs. E. Knight, C. J. Montague, J. E. Lloyd, W. Roots, 

 and R. Pierpoint were elected members. 



Mr. R. South exhibited specimens of FolyommatiLS phlceas, 

 L., with ocellus on under surface of left posterior wing, similar 

 in character to the marginal ocelli on the under surface of 



