( xl ) 



and uote). A similar feature might be recognised iu Argynnis 

 niphe, ? (Ibid., p. 96), in which insect he had drawn atten- 

 tion to the existence of the same series of markings. 



Mr. Elwes, with reference to the American Chrijsophanus 

 hypophlceas, remarked that he was not able to distinguish it 

 as a species from the European C. phlceas, and suggested 

 Pieris hrassiccB as a very suitable subject for experiment ; it 

 varied greatly according to locality, and specimens from the 

 Canary Isles being particularly fine in colouring. 



Mr. Jenner Weir said he was particularly interested in the 

 results obtained with Vanessa atalanta as a monomorphic 

 species, and one very invariable in its markings and co- 

 louring. 



Mr. Merrifield, in reference to Mr. Poulton's observations, 

 said that the stage in which he had found temperature most 

 operative was the one just preceding the appearance of the 

 colouring of the perfect insect in the pupa. He had not been 

 able to distinguish between cold and retardation as causes, 

 seeing that they were generally so closely associated, but in 

 his experiments he thought cold should be pointed to as the 

 agent. He referred to a beautiful series of Pieris napi of 

 the two emergences, from the same brood, exhibited by Mr. 

 Hawes. 



Mr. Kenneth J. Morton communicated a paper entitled 

 " Notes on Hydroptilidm belonging to the European Fauna, 

 with descriptions of new species." Mr. McLachlan made 

 some remarks on the subject of this paper. 



Dr. T. A. Cliapman read a paper entitled " On some 

 neglected points in the structure of the pupa of Heterocerous 

 Lepidoptera, and their probable value in classification ; with 

 some associated observations on larval prolegs." Mr. Poulton, 

 Mr. Tutt, Mr. Hampson, and Mr. Gahan took part in the 

 discussion which ensued. 



Mr. J. Cosmo-Melvill communicated a paper entitled 

 "Description of a new species of Butterfly of the genus 

 Calinaga, from Siam." 



Mr. W. L. Distant communicated a paper entitled 

 "Description of new genera and species of Neotropical 

 Rhynchota.'^ 



