( Ixx ) 



Wednesday, October 4th, 1916. 



Commander J. J. Walker, M.A., R.N., F.L.S., Vice- 

 President, in the Chair. 



Election of a Fellow. 

 Mr. Howard M. Peebles, 13 Chesham Street, S.W., was 

 elected a Fellow of the Society. 



Vote of Condolence. 



A vote of condolence with Mrs. Trimen, on the death of 

 her husband, a former President of the Society, was passed 

 unanimously. 



Exhibitions. 



Method of destroying Locusts. — Mr. P. A. Buxton called 

 the attention of the Society to some remarkable work pub- 

 lished in the Ann. Inst. Pasteur (Paris) for July and August 

 1916. A plague of the locust (Schistocerca peregrina) has 

 been successfully stayed in Morocco by infecting a few 

 thousands with the cocco-bacillus of a fatal enteritis. The 

 individuals infected are devoured by the healthy ones, and 

 so an epizootic may be started which may kill as much as 

 70 per cent, of the swarm of locusts. Experiments were 

 conducted on one host which was advancing on a continuous 

 front of 50 kilometres. 



A new British Ant. — Mr. Donisthorpe exhibited $ 3, 

 $ $ and ^ ^ of Myrmica schencki, Emery. He stated that 

 it had been discovered at Sully, Glamorganshire, by Mr. 

 Hallett last year, and had been identified and introduced as 

 British by himself. He had recently been to stay with Mr. 

 Hallett, and on September 16 they had found three colonies, 

 c? <J being taken which had not been captured in Britain 

 heretofore. He considered it to be a good and distinct species. 



Leaden-coloured Aberrations of Agriades thetis. — Mr. 

 L. W. Newman exhibited two leaden-coloured $ <$ of Agriades 

 thetis and a curious S having part of the wings leaden colour 



