96 



Mr. Dennis exhibited several photographs with the stereoscope, 

 including His])i<ia atra a spinous coleopteron, Formica pratensis a 

 newly described British ant, and sprays of Laburnum and Spirjea. 



Mr. J. Piatt Barrett, a bred living specimen of Strynwn jn-tini 

 which had emerged on June 10th. It was generally considered as 

 an early date for the emergence of the species although Mr. Leeds 

 stated he had met with one or two specimens in early June, but not 

 the bulk of the emergence. Mr. Curwen stated that the species was 

 early in emergence at Eclepens, Switzerland. 



Mr. Dunster exhibited a series of Brenthis euphrosyne taken at 

 Garrard's Cross, Bucks, in late May. 



Mr. B. S. Williams reported that he had recently noticed the 

 buzzing noise made by Hylophila prasinana in flight. He compared 

 the noise to that of a beetle humming. A number of specimens 

 came towards his lantern and in each case the noise was apparent 

 from some distance. Several members stated this phenomenon had 

 been previously reported, but no one present had had a similar 

 experience. 



Mr. B. W. Adkin read some extended notes on Pochyyastn'a trifolii 

 and on Rnrnlis betnlce, with more particular reference to the phases 

 of variation and aberration which he had met with in the two 

 species. He exhibited the following forms : — 



Riiralis hetulce : ab. restricta, ab. restricta-lineata, ab. lata, ab. lata- 

 lineata, ab. fisoni (asymmetrical), ab. cuneata, and an unnamed 

 aberration in which there was an almost complete orange border to 

 all the wings with much orange suffusion. 



Pachyyastria trifolii: ab. flava, ab. ohsoleta-flava, ab. pallida -flavay 

 ab. niedicayinis, ab. viryata-iiwdicayinis, ab. ratama", ab. cervina, ab. 

 unilinea-typica, ab. siiffiisa-typica, ab. rnfa, ab. contracta-riifa, etc. 



Typical forms of the species shown, for comparison. 



He said: "From time to time, I have dipped into those 

 marvellous volumes " British Lepidoptera " by the late J. W. Tutt. 

 Under the heading "Variation" I find long descriptions of many 

 forms of ahiiost every insect with Latin names attached. As a 

 collector, I desire to catch or breed all of those forms. 1 may or 

 may not approve of an attempt to give Latin names to such forms. 

 I may possibly find that there are so many intermediate specimens 

 that the forms may be said to run into one another. I have found 

 in several cases, where my series of species is sufficiently extensive, 

 that the more extreme specimens appear to represent, or closely 

 approach, the forms which are so ably described. I am exhibiting 

 a few specimens of Rnralis hetuUv female to illustrate my meaning. 



