XXXIV JOURNAL OF PROCEEDINGS. 



Calcutta, where, in a paddy-field, he observed several purple patches, 

 which on examination proved to consist of innumerable quantities 

 of a small purple species of beetle allied to Galeruca. 



" On the Tarsi of Insects, vnih reference to the superiority of the 

 Tarsal System in the Coleoptera." By J. O. Westwood, F.L.S., &c. 



" Observations on the Ravages oiLimnoria terebrans, with the sug- 

 gestion of a Preventative against the same." By the Rev. F.W, Hope. 

 Specimens of the wood in its eaten state, and of the insects, were 

 exhibited by the author. 



Mr. Westwood communicated an extract from a Letter containing 

 an account of the injuries committed upon barley and turnips by 

 several species of insects, which were exhibited, belonging to the 

 genera Chcenon and Eucoila, as w^ell as the indurated cocoon and 

 pupa of a Dipterous insect, which, it was feared> might prove to be 

 that of the Musca Frit, Linn., a species exceedingly injurious to 

 barley in Sweden. 



Mr. R. H. Lewis, M.E.S., who had recently returned from a tour 

 in North America, exhibited a living specimen of Cetoniu Indce, cap- 

 tured by himself in the interior of that continent, and which he had 

 preserved alive two months without food. He also exhibited a spe- 

 cimen of Gymnopleurus volvens, captured at the same time, but which 

 had died since its arrival in Ireland. 



It was stated by Mr. Stephens that Galeruca Tanaceti had this 

 year abounded in the north of England ; and that it had likewise 

 occurred in great numbers along the coast. 



Various suggestions were made by different members present for 

 the institution of experiments to prevent the attacks of the Limnoria ; 

 and it was proposed by Mr. Yarrell (notwithstanding the statement 

 made by Mr. Children, that insects immersed in a solution of cor- 

 rosive sublimate will revive, after remaining immersed therein for at 

 least twenty minutes,) that the saturation of piles, &c., in such so- 

 lution might, by the formation of a new compound formed by the 

 action of the corrosive sublimate upon the wood, have the effect of 

 preventing the attacks of insects, as well as the not less injurious 

 attacks of the dry-rot or other vegetable causes of decay. 



With reference to Mr. Westwood's Memoir upon the tarsal sy- 

 stem, the recent observations of MM. Solier, Chevrolat, Delaporte, 

 &c., were noticed in support of the existence of five joints in the 

 tarsi of the supposed tetramerous beetles, as well as the new classi- 

 fication of the longicorn beetles amongst the Pentamera, notwith- 

 standing the evident identity in the structure of their tarsi and those 

 of the Curculionidce and Chrysomelidce. 



