1904.] IQl 



,§orictics. 



Lancashire axu Ciiesuike Entomological Society: IGlh May, 190i. — 

 Bj the kind invitation of Major Ronald Ross, C.B., F.R.S., Pi-ofessor of Tropical 

 Medicine, University of Liverpool, Hon. Member of the Society, a meeting was 

 held in the Johnston Laboratory, Liverpool Univei'sity. 



The following were elected Members of the Society : — Corresponding Members 

 —Professors T. Hudson Beare, B.Sc ,F.R.S.E., F.E.S.,and Edward B. Poulton, M.A., 

 D.Sc, F.R.S., F.L.S., F.E.S. ; Drs. C. R. Billups and Geo. E. J. Cralhin, M.A., L.S.A. ; 

 and Messrs. Geo. T. Bcthune-Baker, F.L.S., F.Z.S., Chas. Capper, A. J. Chitty, 

 M.A., F.E.S., H. St. J. K. Donisthorpe, F.Z.S., F.E.S., W. H. Harwood, J. H. Keys, 

 W. J. Lucas, B.A., F.E.S., B. G. Nevinson, M.A., F.E.S., E. G. B. Nevinson, F.Z.S., 

 F.E.S., E. A. Newbery and Edward Saunders, F.R.S., F.L.S., F.E.S. Ordinary Mem- 

 bers— Messrs. W. P. Blackburne-Maze and H. Berkley Score, F.R.G.S., F.R.Hist.S. 

 The following donation to the Library was made by Major Ross, " The Hibernation 

 of English Mosquitoes" by H. E. Annett, M.D. and J. Everett Button, M.B. 



Professor Ross, Dr. Stevens and the Staff of the Liverpool School of Tropical 

 Medicine, gave demonstrations " On Mosquitoes and other flies in connection with 

 Tropical diseases." Amongst the many interesting exhibits described, were live 

 Trypanosomata of the sleeping sickness and Tsetse Fly diseases, specimens of the 

 Tsetse Fly (Glossina morsitansj, &c., and a series of microscopic preparations 

 showing the characteristic differences in appearance and structure existing between 

 the malarial and harmless gnats, &c., &c. At 8.30, an adjournment was made to the 

 lecture theatre, where Major Ross gave a most instructive and interesting lecture on 

 the connection between malaria and mosquitoes, copiously illustrated by lantern 

 slides. 



The species of Anopheles are by no means all harmful : those that cause malaria 

 can be always distinguished by the black spots along the anterior nervures of the 

 wings, the usual species being A. cortalist and A. funestiis. Their egg-masses are 

 canoe-shaped. The larvae breed in shallow pools of stagnant water, floating flat upon 

 the surface, and feed on confervae. They have no breathing tube, and can thus be easily 

 distinguished from the larvae of our commoner gnats which belong to the genera 

 Culex and Stegomyia, and hang head downwards in the water with a long breathing 

 tube projected upwards to the surface. The larvae of the latter insects breed in 

 tubs, pots, and other vessels lying close to houses. Since the pools were drained 

 and filled up at Ismailia, a town of 6000 inhabitants, the cases of malaria have fallen 

 from 2000 to 200 per annum, and these are nearly all relapses, as only 10 actually 

 fresh cases were reported last year. 



On the motion of Mr. Richard Wilding, seconded by Mr. Willoughby Gardner, 

 F.L.S., F.E.S., a cordial vote of thanks was accorded the lecturer. — E. J. B. Sopp 

 and J. R. la B. Tomlxn, Hon. Secretaries. 



Thk South London Entomological and Natural History Society : 

 May \2th, 1904.— Mr. A. Sicu, F.E.S., President, in the Chair. 



Mr. Goulton exhibited another series of fine photographs of the larva; of 







