37 



Election of a Member. 



George Wailes, Esq., Newcastle-ou-Tyne, was balloted for and elected a 

 Member. 



Exhibitions. 



Mr. Pickersgill exhibited a fine specimen of Argynnis Lathonia, and a variety of 

 Vanessa Urticas in which the colours of the upper wings were not distinct but 

 suffused, and the under wings were almost entirely bluet. Both these butterflies he 

 caught near Eastbourne, Sussex, on the 29th of July last. 



Mr. Saunders exhibiied two examples of a small iiatelliform nidus, probably of a 

 spider, attached to a leaf of Chailetia latifojia received from Rio Negro. 



Mr. Stevens exhibited some Coleopterous larvae, which had destroyed a large 

 cherry-tree drooping by forming galleries in the solid wood, a log of which he 

 also showed. The larvse were probably those of Gnorimus nobilis. 



Mr. Tweedy exhibiied a box of Coleoptera and Lepidoptera, among which were 

 some new species, just received in fine condition from St. Domingo. 



Photographic Representations of Insects. 



Herr Pretsch, Manager of the Imperial Printing Oflice at Vienna, present as 

 a visitor, exhibited a great number of magnified positive photographs of various insects 

 and parts of insects. 



Mr. Westwood observed, that though these figures gave very good general repre- 

 sentations of the objects, yet the details were not sufficiently accurate for entomo- 

 logical purposes; indeed, he had never seen the small parts of insects delineated by 

 this process with the clearness necessary to render the figures of scientific value. 



Mr. Curtis thought that, if greater distinctness in detail could be attained, the 

 photographic process would be invaluable for representations of the wings of the 

 Ichneumonidae and the ueuration of wings generally. 



Singular Specimen of Anthocharis Cardamines. 



The President exhibited a specimen of Anthocharis Cardamines, which had been 

 placed in his hands by Mr. W. Machin, of Mile End: the insect combined the 

 characters of the sexes in a remarkable manner: the whole of the upper surface 

 of the upper wings, as well as the antennse, head, thorax and abdomen, present the 

 normal ai)pearance of a female : there was nothing whatever to induce a doubt of the 

 individual being a female : the same observation applied to the left wings on the 

 under side, but the right upper wing on the under side was adorned with the bright 

 orange mark distinctive of the male. Many insects were known to be subject to what 

 he (the President) had called hemigynism, i. e. when the individual is divided by a 

 right line down the back, the one half being male and the other half female; 

 the peculiarities of each sex extending not only to the distribution of colour, but also 

 to the structure of the antennae, eyes and genitalia ; but the present instance differed 

 from any that he had previously seen, in the fact of the entire upper surface being 

 female. 



