SCIENTIFIC SOCIETIES. 435 



it, nearly seventy in number, were dark coloured, with dark spots and lines. 

 The remainder were of a green colour, much less vivid than in those which 

 had spun up on the leaves, with numerous dark spots and lines on them. 



Mr. R. Adkin exhibited three bred female specimens of Vanessa c-album, 

 two of which belonged to the first brood, and the third to the second brood. 

 One of the specimens of the first brood was remarkable in having the under 

 side of a very dark colour, identical with typical specimens of the second 

 brood. He thought the peculiarity of colouring in this specimen had been 

 caused by a retarded emergence from the pupa, due to low temperature and 

 absence of sunshine. 



Mr. F. W. Frohawk exhibited a series of striking varieties of Satyrus 

 hyperanthns, bred from ova laid by a female taken in the New Forest in 

 July last. 



Mr. F. D. Godman exhibited a specimen of Amphonyx medon, Cr., 

 received from Jalapa, Mexico, having a pouch-like excrescence at the 

 apex of its body. Mr. McLachlan, Mr. H. J. Elwes and Mr. Poulton 

 commented on it. 



Mr. C.J. Gahan communicated a paper entitled "Additions to the 

 Longicornia of Mexico and Central America, with notes on some previously 

 recorded species." 



Mr. W. L. Distant communicated a paper entitled " Contributions to 

 a knowledge of the Homopterous family Fulgoridae." 



Mr. Oswald Latter read a paper (which was illustrated by the Society's 

 new oxy-hydrogen lantern) entitled " The Secretion of Potassium-Hydroxide 

 by Dicranura vinula, and the emergence of the imago from the cocoon." 



Mr. H. J. Elwes and Mr. J. Edwards read a paper, also illustrated by 

 the oxy-hydrogen lantern, entitled " A revision of the genus Ypthima, 

 principally founded on the form of the genitalia in the male sex." 

 Mr. McLachlan said he attached great importance to the genitalia as 

 structural characters in determining species, and he believed that he 

 could name almost any species of European Trichoptera simply from an 

 examination of the detached abdomens of the males. Mr. Osbert Salvin 

 said he had examined the genitalia of a large number of Hesperidse, with 

 the view of considering their value in distinguishing species, but at present 

 he had not matured his observations. 



Mr. S. H. Scudder communicated a paper entitled " New light on the 

 formation of the abdominal pouch in Pamassius " Mr. Elwes said he had 

 based his classification of the species of this genus largely on the structure 

 of this abdominal pouch in the female. Mr. Jenner Weir remarked that a 

 similar abdominal pouch was to be found in the genus Acraa; and 

 Mr. Hampson referred to a male and female of Pamassius in Mr. Leech's 

 collection, in which the pouch had come away from the female and was 

 adhering to the male organs. — H. Goss & W. W. Fowler, Hon. Secretaries, 



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