43 



and Baron Von Menninger had seen larvae similar to that described 

 by Miss Morris; the latter of which were tfiought by Curator Kollar 

 to produce the Cecidomyia Destructor of Say, although in Germany, 

 in which that species was not hitherto known to exist; and some of 

 the former of which were found by Mr. Worth, to produce pupae 

 under the sheath of the leaf, as the Cecidomyia does. Other illustra- 

 tions were drawn by Dr. Coates, from nearly related species ; and it 

 was urged that the law by which insects possess a power of accom- 

 modation to circumstances, in depositing their eggs in unusual and 

 diversified places, to the great modification of the larva, had never 

 been shown to be inapplicable to this case. 



Part of the objections of Mr. Walker's correspondent, were referred 

 by Dr. Coates to an error in the minutes, and which had been trans- 

 ferred to the published Proceedings of the Society; by which Miss 

 Morris was incorrectly represented as mentioning in her paper the 

 parasitic insect which stings the Hessian Fly. In the opinion of Mr. 

 Westwood, as stated by Dr. C, this parasite, generally known as a 

 Ceraphron, should be referred to the genus Pteromalas. 



Mr. Lea, on behalf of the Committee of Publication, laid 

 upon the table Part 3, Vol. VII. of the Transactions of the So- 

 ciety, which completes the volume. 



In accordance with a recommendation contained in a Report 

 from the Secretaries, they were discharged from the further 

 consideration of the subject referred to them by the Society's 

 resolution of 15th January last. 



Stated Meeting, April 16. 



Present, forty-seven members. 



Mr. Du Ponceau, President, in the Chair. 



Major Graham, of the United States' Army, and Professor 

 Alexander, of Princeton, N. J., members elect, were intro- 

 duced, signed the Laws, and took their seats. 



Letters were read — 



From Mr. Francisco Martinez de la Rosa, dated Paris, 15th 

 Feb. 1841, making acknowledgments for the honour of his elec- 

 tion to membership: — 



