31 



MARCH \i,ih, 1895. 



T. W. Hall, Esq., F.E.S., President, in the Chair. 



Mr. B. G. Rye, of Fulham Road, S.W., was elected a 

 member. 



Mr. Frohawk exhibited a long and magnificent series of 

 Vanessa c-albuin, L., consisting of one hundred and fifty- 

 four specimens, being part of a brood, bred from ova 

 deposited by a hybernated female captured in Hereford last 

 April, and showing the remarkable difference of the two 

 forms (light and dark). Some of the light forms were excep- 

 tionally light and large. The first emerged on June 30th, 

 the last on August 2nd. The pale forms were the first to 

 emerge. (For full particulars of this brood vide " Entomolo- 

 gist," 1894, pp. 257— 287.) _ 



A long and interesting discussion ensued. Mr. Tutt said 

 he believed that only the dark form of this species was 

 found after hybernation in the spring. He was in consider- 

 able doubt whether the species was wholly double brooded, 

 and suggested as an explanation of the various facts, that 

 the dark form did not reproduce during the same season as 

 it emerged, but went into hybernation, while the light forms 

 at once proceeded to copulate and lay ; the coloration 

 being the outward and visible sign of the dimorphic nature. 

 The second brood consisted very largely of light specimens. 

 In confirmation of these views, he said that Mr. Merrifield's 

 experiments showed that a pallid coloration was coincident 

 with rapid development. Mr. Mansbridge referred to a 

 dimorphic American species, V. inten'ogationis, F. The 

 autumn form was dark, V. fabricii, Edw., and was the only 

 form found after hybernation, whereas the summer form was 

 considerably paler. Messrs. Barrett, Carrington, and others 

 also took part in the discussion. 



Mr. R. Adkin exhibited a series of Melanippe hastata, L., 

 taken in Sutherland in 1894, which were of interest as being 

 intermediate between the southern and more suffused forms 

 of some of the more northern localities. 



Mr. Sauze exhibited a living specimen of Ai,dipoda tartarica, 

 one of several locusts imported in garden produce from 



Mr. A. Hall exhibited a Pierine butterfly, Ithomia patilla, 

 Hew., together with the Danaine species DismorphiaforUmata, 

 Luc, from Nicaragua, which it resembled. 



