M. fastuosella was really distinct from M. subpurpiirella. In conversation with Herr 

 Kaltenbaoh I learned tliat M. fastuosella appears with him as early as March, and 

 that the feeding larvas are to be found in April, when the nut-leaves are not yet fully ex- 

 panded, and the dried nut leaves which I saw fully confirmed this statement by their 

 small size. By the end of April the season for these larvae is over. 



"I should trust that with this information we should next spring have no diffi- 

 culty in finding the hazel-miners in England." 



Prof. Westwood exhibited a further portion of the additions recently made to the 

 Oxford Museum by Mr. Stone, of Brighthamjston. The exhibition on the present 

 occasion consisted principally of the dried leaves of trees and plants which had been 

 mined by the larvse of Lepidopterous, or in more numerous instances of Dipterous, 

 insects. The leaves were arranged for the cabinet on cardboard, so as to show at a 

 glance the distinctions between the various mines, — a point of considerable impor- 

 tance in the determination of the different species. 



Prof. Westwood also called attention to the state of the turnip crops in the Mid- 

 land Counties; he had been informed that the turnips had been attacked by a pro- 

 fusion of a green insect, like that on the rose, and hence he had inferred the presence 

 of a species of Aphis. Some turnip-leaves had subsequently been sent to him ; the 

 outer ones were dead and shrivelled, and both sides of the leaves and the stems were 

 coated with a thick white mould, but no Aphides were visible. Whether the while 

 matter had by his informants been mistaken for the insect, or whether it was the result 

 of the attacks of Aphides, the Professor was unable to state ; but he thought the latter 

 hypothesis the more probable, and that the plants had been reduced to a bad state of 

 health by the attacks of an Aphis, and the mould had grown in consequence. 



Prof. Westwood also called the attention of the Members present to the Report of 

 the discussion which took place at the April Meeting of the Society, upon a paper by 

 Dr. Schaum, on the impropriety of superseding generally-adopted names of species in 

 Entomology, where descriptions of the same species had previously appeared, but 

 which, from the imperfect nature of the description, it had not been possible to 

 recognize without an exaniination of the type specimens of the original author. 

 After a short abstract of Dr. Schaum's paper, Prof. Westwood was staled, in the 

 Beport, to have oppased the views of Dr. Schaum. Such was not, however, the case ; 

 in fact he cordially adopted every word contained in the abstract of the Memoir as 

 published in the 'Proceedings' for May last, thinking that by so doing he was 

 lending a hand against the publication of carelessly-drawn-up descriptions, often 

 made without a fit preparatory examination, either of the insects themselves, or the 

 works of the authors who had treated upon the groups to which they belonged. 

 To sink entirely the writings of authors who might occasionally err in their 

 descriptions, or even those whose descriptions were habitually drawn up in a careless 

 manner, as had been recently suggested, appeared to him too violent a measure, 

 although their retention entailed a painful amount of labour on subsequent entomolo- 

 gists, unattended also, in many instances, by any certitude as to the species intended. 

 For himself he believed it more correct that every description should stand on its 

 own footing; and if it could be shown to be unintelligible, or should exhibit such an 

 amount of carelessness in its composition as to render it impossible for an entomolo- 

 gist to determine a species by it, he should not hesitate to consider it as if it had never 

 existed. It was true that he considered the law of priority in nomenclature to be of the 



