100 



Mr. Dennis exhibited a long series of slides of various 

 species of galls. 



Mr. Edwards exhibited slides illustrating the natural 

 history and structure of the cockroach. 



MARCH 24ih, 1910. 

 Mr. A. SiCH, F.E.S., Vice-President, in the Chair. 



Mr. A. Sich exhibited three specimens of Coleophora troglo- 

 dytella, bred from larva; collected by Mr. H. Leonard Sich 

 at Bepton, Sussex, off Achillea millefolium, in 1907. They 

 fed up well on this plant, in June, burrowing into the hne 

 segments of the leaves, thus differing much in habit from 

 Coleophora argentula, which is more commonly found on 

 Achillea and feeds in autumn on the seeds. He also showed 

 specimens of the larva of, most probably, Borkhaiisenia 

 psendospretella, found that day in mignonette seeds, in a 

 potting shed, Chiswick. 



Mr. Robert Adkin exhibited bred and captured series of 

 TcEuiocampa gothica from the Shetland and Orkney Islands 

 and various localities on the Scottish mainland. Among 

 those from Orkney, Inverness, Rannoch, and Forres were 

 specimens showing various tones of colour, from light greyish- 

 brown to a rich dark reddish-brown, and from which the 

 " Gothic mark " was practically absent ; indeed, in these 

 specimens, the whole of the markings were nearly obsolete. 

 These, he said, were the forms that for many years had done 

 duty for var. gothicina, H.S., but, as Tutt had already pointed 

 out (" Brit. Noc," vol. ii, p. 150), this was quite wrong. 

 Herrich-Schaffer, in his differentiation of gothica and gothicina, 

 says (vol. ii, p. 196), " Gothica — inter stigmata ambo macula 

 quadrata nigerrima " ; and " Gothiciana, inter stigmata ambo 

 macula quadrata ferruginea," which clearly implies that the 

 difference between the two forms is that the quadrate mark 

 between the stigmata (the Gothic mark) is black in gothica 

 and rust-coloured in gothicina. If we turn to his figures of 

 the latter (pi. xxvi, figs. 125, 126) we find an insect, as, 

 perhaps, is often the case, a little overdrawn, but unmistak- 

 ably showing the quadrate mark between the stigmata 

 distinct and reddish-brown in colour. Occasionally one 

 sees a specimen among the Scotch examples of T. gothica 

 that fits both the description and figures ; indeed, among 

 the series exhibited from Rannoch there is one, but it 



