39 



November 4, 1850. 

 G. R. Waterhouse, Esq., President, in the chair. 



The following donations were received, and thanks ordered to be given to the 

 respective donors : The ' Zoologist ' for November ; presented by the Editor. ' Lecture 

 on Blights,' by F. Plomley, Esq., M.D. ; presented by the Author. ' Fauna Japonica, 

 Auctore Ph. F. De Siebold ; Crustacea, elaborante W. De Haan, 1850 ;' presented 

 by Heir De Haan, Hon. For. M.E.S. ' Memoires de la Societe des Sciences de 

 l'Agriculture at des Arts de Lille, 1842 — 9;' presented by the Society. 'Enumera- 

 tion des Tnsectes qui Consomment les Tabacs,' by M. Guerin-Meneville ; ' Essai sur 

 les Maladies des Vers a Soie,' by M. Guerin-Meneville •, ' Analyse des Experimens 

 sur la Muscardine,' by M. Guerin-Meneville ; all presented'by the Author. 



The Rev. Joseph Greene, Miss Stopford, and Mr. Thomas Thompson were bal- 

 loted for and elected Subscribers of the Society. 



Mr. Westwood mentioned that M. Guerin had observed that the structure of the 

 blood in diseased silkworms, was found, when viewed under microscopes of high 

 powers, to be considerably altered. The small granules, which in the healthy blood 

 were found to be oval, or round ; in the diseased blood became elongated, and then 

 branched ; thus, apparently turning from an animal into the vegetable substance 

 known as muscardine. 



Mr. Shepherd exhibited an Hermaphrodite Nonagria Cannae, of which, however, 

 both the antennae were male. 



Mr. S. Stevens exhibited some cocoons of a Bombyx from Columbia, in each of 

 three of which he had found two pupae. He also exhibited the four new species 

 of Australian Coleoptera, Clytus spinicornis, Saperda bilabilis, Cerambyxsubserratus 

 and Agasma semicrudum, described by Mr. Newman in the 'Zoologist.' 



Mr. Stevens also exhibited some specimens of insect economy, brought from South 

 Australia by Mr. Mossman. 



Mr. J. F. Stephens exhibited specimens from Scotland, of Dictyopterus Aurora, 

 a beetle new to Britain, and Tinea ochraceella, of Tengstrom ; the latter species had 

 been found by Mr. Weaver in ants' nests. 



Mr. Bond exhibited some rare Lepidoptera he had taken at Ventnor, in August, 

 including Agrotis lunigera, Catoptria pupillana, Depressaria caprella, rotundella, 

 Douglasella, nanatella and pallorella. 



The President exhibited on behalf of Mr. G. Ransome, a very fine Deilephila 

 Celerio recently taken at Ipswich. 



Mr. W. F. Evans exhibited four specimens of a Culex, which had accidently been 

 enclosed in a letter received from Commander Pullen, dated Great Slave Lake, 28th 

 June, 1850, in latitude 61 degrees. The great abundance and intolerable annoyance 

 of these little pests in high latitudes, had been mentioned by Sir G. Back, in his ac- 

 count of the Arctic Land Expedition, in 1833 ; and by Sir John Franklin, in his 

 account of his journey to the Polar Sea in 1819 — 22. 



The President read a letter from M. Blisson, requesting from the members of the 

 Society, information concerning certain British Coleoptera, to be incorporated in a 

 work he was preparing on that order. 



