147 



Hadena protea, Bork., Epiinda lutulenta, Bork., a pretty 

 banded form of Cidaria testata, L., a beautiful clouded form 

 of C. pyraliata, Fb., Polia chi, L., var. olivacea, St., Apaniea 

 didyma, Esp. of the colour of Miana literosu. Haw., and 

 curious Camptogramma bilineata, L. 



Mr. Barrett, referring to his exhibit, said it was extremely- 

 interesting that both light and dark forms of so many species 

 should occur in one locality ; climate was now considered to 

 have much to do with producing variation in colour, and it 

 did not appear that the effect was always in the same direc- 

 tion. In some the modification would be to darken, in others 

 to make paler, and in some both ways. In the West of Ireland 

 the climate was. an exceedingly wet and stormy one, and such 

 as was expected to produce dark colouring, yet both pale and 

 dark forms occurred there year after year. 



Mr. South said that the form of LyccBua icarus^ with black 

 spots on the hind margin, occurred in the Isle of Wight, and 

 he had received it from Perthshire. 



Mr. Fenn, referring to the occurrence of pale and dark 

 forms together, said in his opinion it did not amount to much, 

 as in variable species it was usual to take both pale and light 

 forms wherever collecting, and he gave as instances C. inima- 

 naia and A. cursoria. 



Mr. Tutt said this was well known to all Lepidopterists, 

 but there was generally a particular characteristic for every 

 particular locality: the palest and whitest examples oi A. 

 tritici occurred at Deal ; at the same time some were almost 

 black, yet there was a general tendency to a bluish tinge ; 

 Mr. Russ's specimens showed a tendency towards brown, 

 although there were extremely dark and pale specimens 

 among them. Xylophasia monoglypha, Hufn., in Ireland and 

 Scotland had a tendency to become very dark, but pale forms 

 did occur. Tceniocampa incerta, Hufn., from Forres, was of 

 a reddish colour, but in other localities there were black and 

 grey ones. Noctna castanea, Esp., and its variety neglecta, 

 Hb., was another case in point. 



Mr. Jenner Weir, referring to the specimens of P. napi, said 

 he had received examples from Cavan half-way between the 

 ordinary form and the variety bryonies. 



Mr. Barrett remarked that in South Wales the spring 

 emergence generally produced the darkest specimens ; some 

 five or six years ago, however, he happened to be at Belfast 

 in August, and then took a series of the autumnal emergence, 

 very large and dark specimens. Desiring to obtain specimens 

 of the spring brood from the same locality, he got a friend to 



