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Mr. W. West (Greenwich) exhibited a pair of Calosonia 

 sycophanta, L., male and female, one of which he stated was 

 captured in 1873 at Freshwater Bay, and the other in 1888 

 in Greenwich Park, Kent. 



A microscopical exhibition was then given. Mr. Knock 

 showing a series of slides illustrating the life-history of the 

 Hessian Fly {Cecidomyia destructor, Say.) comprising eggs in 

 situ on barley, larvae and puparium in situ in stem of 

 barley, exuviae of pupa protruding from the puparium, male 

 and female of the fly, also puparium and imago of the para- 

 site Semitelliis destructor, Say. Mr. West (Streatham), scales 

 of Podura. Mr. Dennis, ova of Folyonimatus phlcsas, L., and 

 ovum of Lyccena csgon, Schifif. Mr. R. Adkin, parts of the 

 larvse of Orgyia atttiqua, L. Mr. Boutell, gizzard of House 

 Cricket {Acheta domesticd), and eggs of Ligdia adustata, 

 Schiff. 



APRIL wth, 1889. 

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



Messrs. A. W, Dennis and G. E. Dench were elected 

 members. 



Mr. Jenner Weir exhibited some butterflies which he had 

 desquamated by the " Waterhouse process " — i.e., by first 

 immersing them in alcohol, and then soaking them for a 

 few minutes in eau de Javelle (solution of hypochlorite of 

 potash). He remarked that although the scales of the wings 

 were dissolved, yet the hairs remained unaffected, and that 

 the green pattern in the wings of such butterflies as Papilio 

 lurlinus and Tirumula petiverana retained its colour after 

 desquamation ; the markings were therefore not merely super- 

 ficial on these insects. On the other hand, the green colour 

 of the wings of Ornithoptera arriLana appeared to be in the 

 scales only, and was quite removed by the " Waterhouse 

 process." 



Mr. R. South exhibited several species of Lepidoptera, 

 concerning which he made the following remarks : — 



'^ Plusia iota, L. i. Typical specimen; 2 and 3, var. per- 

 contationis, Treitschke, in which the metallic spots are united 

 and form a gamma-like mark ; 4, 5 and 6 show modification 

 of metallic spots in the direction of evanescence. Complete 



