290 ENTOMOLOGICAL SOCIETY OF LONDON. 



The Chairman exhibited a collection of Trilohites. He 

 said it was his intention to publish a Monograph of British 

 species ; and should be obliged to any gentleman for any com- 

 munication; or the loan of any specimen should be duly 

 acknowledged. 



A list of Coleoptera, taken in the Scilly Islands by Mr. 

 Home, was read in a letter from that gentleman ; with a des- 

 scription of a single specimen of a genus which he claimed to 

 be entirely new to British Entomology. 



A Flower-Pot in which had been deposited some roots of 

 the sugar cane, with the original mould, exhibited last year, 

 was produced ; in which had sprung up, in the Society's room, 

 a grass new to several British botanists who had seen it ; and 

 on the blades of grass had been discovered an Aphis, which 

 Mr. Westwood described as entirely new. Specimens of the 

 Aphis were exhibited. 



A letter communicated by Mr. Johnson was read, giving an 

 account of the rapid increase of the mole-cricket in the island 

 of Jamaica, since a particular hurricane a few years back. 

 This insect had become so destructive to the grass and young 

 cane, that any suggestions for its extermination would be 

 truly valuable. With regard to the hurricane, it was suggested, 

 that probably some destroyer of the insect in one or more of 

 its stages had been swept away by the hurricane, rather than 

 that it had been brought to the island by that visitation. 

 One or two members thought that the eggs might be searched 

 after, and destroyed in sufficient quantities to keep the insect 

 down ; others thought that the full-grown insect, being of so 

 considerable size, might be persecuted to destruction. Mr. 

 Waterhouse doubted whether any such destroying means could 

 match the fruitful powers of nature. He attributed the great 

 increase of particular species of insects very much to a succes- 

 sion of the same crops in or near the same localities ; and 

 thought that a remedy would be found in a skilful distribution 

 and occasional total omission of infested crops.* 



An original communication from Pallas, the Russian 

 Entomologist, addressed to the Aurelian Society of London, 

 was read. It gave a very interesting account of the habits of 



* The idea that the mole-cricket is injurious to vegetation, is daily losing 

 ground: it is now generally supposed to be beneficial than otherwise, by devour- 

 ing subterraneous larvae, &c. — Ed. 



