S.B. from Bournemouth
This disastrous species of blood-sucking fly received no attention until the close of the nineteenth century, when the researches of Ross (in India) and Grassia (in Italy) made it clear that the mosquito was largely responsible for the dissemination of malaria. It is not generally realized that there are some fifteen hundred species of mosquitos and that, although they thrive best in the tropics, they are also to be found in the Arctic regions where not only arc there no human beings to give them blood, but no quadrupeds even. Mr. J. F. Marshall, who is giving this talk, is Director of the British Mosquito Control Institute on Hayling Island, and he will tell us something of the work of this Institute in fighting one of man's most insidious enemies.