G9 



than it had done during the previous few years, and that 

 he had paid some attention to overhauling the females with 

 a view to finding individuals showing blue coloration. Those 

 exhibited were the most marked in that respect, and although 

 by far the larger proportion showed some degree of blue 

 scaling, none of them that he had come across were extreme. 

 He had compared them with series of the spring brood from 

 Folkestone, which occupied a corresponding position on the 

 North Downs to Eastbourne on the South Downs, and 

 with which they agreed very closely in regard to the degree of 

 blue scaling, also with series from Reigate and other inland 

 places on the North Downs, which included some strongly 

 blue examples, and remarked that in his experience the blue 

 scaling was infinitely more frequent in the spring than in the 

 autumn brood, and that the extreme blue forms were of much 

 more common occurrence on the inland portions of the North 

 Downs, than on those near the coast or of the South Downs. 



Mr. Alfred Sich exhibited mines of Gypsonoma accviana, 

 Phyllocnistis suffusclla, and Nepticula tvimaculella, in leaves of 

 Populus fastigiata ; and contributed the following notes : 



" (i) The larval mine of the tortrix, Gypsonoma aceriana, 

 is shown in its first stage, where it attacks the leaf near the 

 mid-rib. It subsequently bores down the leaf stalk and 

 enters the shoot, where it hibernates, feeding in the spring 

 in the interior of the twig at the top (as is well known). 



" (2) Mines of Phyllocnistis suffusella and cocoons in the 

 mines. The insect differs from most leaf-miners in eating 

 only the juice of the leaf. In its first three instars it is 

 perhaps the most unlepidopterous-looking larva we have, and 

 in its fourth instar it never eats, but only spins its cocoon. It 

 is abundant most years in poplar leaves. (Further particulars 

 see Sich, on " Early Stages of P. suffusella," " City of London 

 Trans.," 1902.) 



" (3) The empty mine of Nepticula tviuiaculclla. This 

 larva makes a short, rather wide mine in the leaf, and, like 

 most Nepticulas, leaves the mine in order to pupate. Empty 

 mines are fairly abundant, but the full ones, from not being 

 so conspicuous, are not so often seen. 



Mr. Hugh Main exhibited a batch of the very beautiful 

 ova of Satyr us briseis, laid by a female taken in Switzerland. 

 He also exhibited, on behalf of Mr. Oldham, of Woodford, a 

 fine <$ of C osmotrichc potatoria, with female coloration, bred 

 from a Cambridge larva, and an example of Abraxas grossu- 

 lariata, with a considerably increased suffusion of black, 

 bred from Harlow. 



