36 



sea level, affected the pupge to such an extent as to retard 

 three-fifths until the warm sun of April reassured the dormant 

 imago." 



Mr. J. Jenner Weir stated this was the most interesting 

 exhibition he had ever seen on this subject ; one portion of 

 the larvae produced from one female emergin<T as the summer 

 form, and the other portion as the spring form, and reared 

 under exactly similar conditions. After referring to the 

 differences between the two forms, he concluded by adding 

 that although he had devoted considerable years to the study 

 of this species he had never succeeded in obtaining so conclu- 

 sive a case as this as to the identity of the two forms, to which 

 earlier writers had given distinct names. Mr. Weir also 

 called attention to the careless way in which the two forms 

 were placed together in most collections. 



Mr. Frohawk exhibited two pupse of Argynnis paphia, L., 

 and stated that the larvae had only attached themselves for 

 pupation early yesterday morning, and on looking last night 

 they had both pupated, the time occupied being from 

 eighteen to twenty hours ; the temperature was 8o° in the 

 shade. Referring to the brilliancy of the metallic spots, he 

 expressed an opinion that the object of it was mimicry of a 

 dewdrop on a dead leaf. 



Mr. Frohawk also stated that the larva of A. euphrosyne, 

 L., exhibited by him at the last meeting, had pupated on 

 the 24th inst. 



Mr. Carpenter exhibited a specimen of Vanessa antiopa, 

 L., taken on Tooting Common some years back. 



Mr. R. Adkin exhibited Asteroscopus nubeculosa, Esp.,and 

 remarking on the time the specimen had been in pupa, viz., 

 two years, added that on the previous occasion he bred-the 

 species the larvae went down m 1884, none emerged in 1885 

 or 1886, but five emerged in 1887. 



Mr. Tugwell exhibited the specimens taken by him at 

 Tilgate Forest, and referred to at the previous meeting, viz., 

 Nisoniades tages, L., which showed considerable variation. 

 Syrichthus malvce, L., also varied considerably, one example 

 closely approaching the variety taras, Meig.; Argynnis 

 euphrosyne^ L., showed an enlargement of the black spots, 

 and Phytometra viridaria^ Clerck., were as large and rosy as 

 specimens coming from the New Forest. 



Observations were made on the unusual abundance of 

 Plusia gamma, L., in the summer of 1892 ; and Mr. Adkin 

 remarked that up to the 24th of May he had not noticed a 

 single specimen of the species, but that on the evening of 



