1891.] 115 



with a case soiiiowli.it resembling that of the Lepidopterous genus Psyche, which 

 was found at tlie Theatre of Bacchus, Athens. 



Mr. J. W. Douglas sent for exhibition specimens of Icerya {Crossotosoma) 

 csgyptiaca, which, through the kindness of Mr. A. D. Michael, he had recciyed from 

 Alexandria on the 19th January last. It was stated that in travelling most of them 

 had become loose, and had lost their waxen appendages ; but a few still remained 

 on the stems of their food-plant. In connection with this subject, Mr. G. H. Verrall 

 alluded to a Dipterous parasite of Icerya from Adelaide — Lestophonus icerya, 

 Williston, — which had been bred form Icerya Furchasi, Mask., last February. Mr. 

 McLachlan and Lord Walsingham continued the discussion. 



]Mr. R. Adkin exhibited a long and interesting series of Triphana comes 

 (orbona), from various parts of the South of England, Yorkshire, Forres, the Isle 

 of Man, the Isle of Lewis, and the North of Ireland. 



Mr. Gr. F. Hampsou exhibited a series of varieties of Plotheia frontalis, Walk., 

 which was the only species in the genus, and confined to Ceylon. He said that the 

 varied forms of this species had been described under twenty-one different names 

 by Walker, Felder, and Moore. 



Mr. F. Merrifield showed a number of specimens of Selenia illustrana, of 

 three different stocks, proving that the spring brood of this species, which passed 

 the winter in the pupal stage, was, like the summer pupa, materially affected in 

 colouring by the temperature to which the pupa had been exposed in its later stages. 

 He thought this fact, coupled with similar results ascertained with respect to the 

 single-brooded Ennomos autumnaria, indicated that the operating cause was one of 

 wide general application, and that valuable results might be looked for if entomo- 

 logists would turn their attention to the subject. Mr. H. J. Elwes said that in his 

 experience in many parts of the Palsearctic region, in Japan, in the Taurus Mount- 

 ains, on the north-eastern part of the Mediterranean, in the Canary Islands, and 

 elsewhere, where there was a combination of heat and moisture, all the commoner 

 species of Lepidoptera occurring in this country attained a larger size and a greater 

 brilliancy of colouring than in colder and drier regions ; and he referred to such 

 species, amongst others, as Pieris brassiccB and Argynnis Paphia. The discussion 

 was continued by Mr. Jacoby, Mr. Fenn, and others. 



Mr. W. H. B. Fletcher exhibited a long series of Zygana lonicerce from York, 

 and Zyycena Jilipendulce from Shoreham, Sussex ; also a series of hybrids obtained 

 by crossing these two species. He stated that the eggs obtained from these hybrids 

 were all infertile. Lord Walsingham said this latter fact was extremely interesting . 



Mr. F. W. Frohawk exhibited a living specimen of an ichneumon which had 

 just emerged from a chrysalis of Papilio Turnus. 



Mr. C. J. Gahan exhibited a number of species belonging to the genera Letna 

 and Diabrotica, and read a paper on them, entitled, " On mimetic resemblances 

 between species of the Coleopterous genera Letna and Diabrotica." Lord Walsing- 

 ham, Mr. Jacoby, Colonel Swinhoe, and Mr. Champion took part in the discussion 

 which ensued. — II. Goss and W. W. Fowler, Hon. Secretaries. 



