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sure to arise, and it would be impossible to suppose otherwise. 

 In the present state of the question, he felt disposed to say 

 that impar was not a clear species, but it should be bred from 

 the larvae before we could speak with certainty. It appeared 

 to him that it was only a dominant variety of the particular 

 district in which Mr. Farren had taken the insect. 



Mr. Tugwell said he quite endorsed what Mr. Weir had 

 said, and that, in his opinion, it was simply a local form of 

 muralis, and nothing more. 



Mr. Wellman concurred in this view, as did several other 

 members. 



Mr. Carrington said he had never heard of any of the 

 genus Bryophila having been reared from ova. He was of 

 opinion that if ova were obtained it would not be such a 

 difficult matter to rear the larva as was generally supposed ; 

 and if reared, it would no doubt clear up the disputed point. 



Mr. Oldham made a communication to the effect that the 

 Long Pond, in the Warren at Folkestone, had been destroyed 

 by the erosion of the coast by the sea ; and he exhibited a 

 fossil of Pecten beevori, in a fine state of preservation, partially 

 covered with iron pyrites. 



NOVEMBER \th, 1886. 

 R. Adkin, Esq., F.E.S., President^ in the Chair. 



Mr. Billups exhibited seven male specimens of Halictiis 

 xanthoptis, Kirby, a species of Hymenoptera-Aculeata, from 

 Reigate, Surrey ; and he stated that the whole seven were 

 taken on one solitary bloom of thistle. The species was very 

 local and appeared to prefer situations on the coast. It was 

 occasionally plentiful at Hastings, Ventnor, Arundel, Little- 

 hampton, Southend, and Deal, but had not been recorded so 

 far inland as Reigate, nor taken later than the month of 

 August. The date of the capture of those exhibited was the 

 30th October, and was probably without precedent, and only 



