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constant. In this variety the usual characteristic dark olive- 

 green markings are replaced by dull grey, whilst the pale 

 streak that runs from the inner margin to the tip of v/ing is 

 obscured and dull in colour. The inferior wings are dull pale 

 grey, lacking the usual rich rose shade at the anal angle. The 

 body is also grey, instead of olive green." Mr. Tugwell also 

 exhibited a variety of Chcerocampa porcellus, L., in which the 

 usual deep rose-pink colour was almost absent, only the body 

 being normal. The superior wings with a very narrow costal 

 line of rose colour, the entire disc of wing, pale olive green, 

 with faint grey shading, the hind wing pale olive green, 

 shaded with grey marking. 



Mr. Carrington, with reference to the varieties of Z). galii, 

 said that the variation appeared to be caused by an absence 

 of the ordinary pigment. Mr. White asked whether Mr. 

 Tugwell could give details of the exact conditions under 

 which the varieties of D. galii were bred, as they seemed to 

 be in a somewhat immature condition, the hairs apparently 

 adhering to the body and abdomen as if the specimen had 

 not freely developed ; it would also be of interest to know at 

 what temperature the specimens had been developed, and the 

 time of emergence as compared with the normal examples 

 that were bred. Mr. Tugwell, in reply, said the larvae were 

 found and fed at Deal, as far as possible under natural condi- 

 tions ; most of them pupated there ; but in order to force 

 them, they were, on his return to London, placed on sand and 

 covered with damp sphagnum in a room where the tempera- 

 ture was kept at about 70° ; the two varieties emerged in the 

 month of January, and were the only two that varied in any 

 way, although he had bred some seventy specimens up to 

 that date. He was not prepared to give any reason for the 

 semi-diaphanous appearance of the specimens, but he thought 

 Mr. White was hardly correct in suggesting that the speci- 

 mens were not properly developed. 



Mr. C. A, Briggs exhibited TriphcBua comes, Hb., and T. 

 orbona, Hufn., from various localities, calling attention to the 

 T. orbona, from Unst, which showed hardly any variation. 



Mr. Turner exhibited pale pink forms of Zygcena filipendulce, 

 L., bred from pupae collected at Reigate, Surrey. 



