86 



by Dioryctria abictella; cocoons of Nolo, centonalis on grass 

 stems, and of Hylophila bicolorana on oak leaves. He called 

 attention to the great strength given to these latter by 

 their boat-like construction, the "keel" and "bilge-pieces'* 

 giving these apparently fragile cocoons strength to with- 

 stand the battering occasioned by the leaves to which they 

 are attached being driven against each other by a high wind, 

 so long as the cocoon remained intact, but the emergence of 

 the moth causing the end to split, the whole strength of the 

 structure went. 



Specimens of Zenillia (Myxexorista) roscance, B. and B., a 

 species of the Tachinid group of the Diptera not previously 

 recorded as British, which he had reared from larvae and 

 pupae of Tortrix pronubana during the past summer. He 

 was indebted to Messrs. Collin and Wainwright for their 

 identification, and for the information that the species had 

 been reared on the Continent from Tortrix roscana by 

 Bergenstrum, but had not previously been met with in 

 Britain. 



Mr. G. T. Porritt exhibited varieties of Abraxas grossu- 

 lariata bred from wild Huddersfield larvae during the past 

 year. They included a pale female specimen in which the 

 usual yellow was entirely replaced by olive-green, a very 

 pretty pale specimen with broad orange band, and a 

 varlcyata male with a double row of white rays on the 

 hind-wings, and the only specimen he had ever bred with 

 an inner as well as outer row of white rays. 



Mr. L. W. Newman exhibited a long bred series of 

 Polygonia (Grapta) c-album bred from ova including var. 

 Jwtchinsoni, and read the following notes on its life-history. 



" During the past season I have had ample chances of 

 studying the habits of this butterfly, having bred over 2000 

 of them. We all, I expect, think we know the habits of 

 this species. It hibernates as an imago, pairs in the spring, 

 lays its eggs, and dies. 



' The larvae feed up and produce imagines in July ; these 

 imagines again pair and lay ova which produce the brood 

 that emerges in September and October, and go into hiber- 

 nation. The imagines which emerge in July have, as a rule, 

 the light underside known as var. hutchinsoni. 



"This is, I believe, the general idea. 



" Some of this is correct, but, in my opinion, part is quite 

 wrong. 



" I will now make two statements, which I do not at 

 all expect you to accept without ample proof. 



