11 man. Indeed other mammals, birds and reptiles are attacked and in some species we do not yet know what their favourite blood is. Of all the flies, the mosquito has probably absorbed more man hours in study, observation and attempted elimination than any other. The reason of course is now well known to all, Malaria. The mosquito carries Malaria and transfers the blood parasite (Plasmodium) from person to person as she goes on her merry way. Of course Malaria is primarily a tropical disease, but even in Britain we have occasional cases and in the not so distant past areas of low lying-Britain such as Essex had a considerable problem with the "Ague". Mr. A. Bacot, in an Essex Naturalist of 1918, quoted a letter from a field club member, Mr. Thomas Barret Leonard of Aveley, in which he wrote, "When I was a boy, Ague was fairly common here. I remember my mother used to dose workmen on the estate with port and quinine, and she suffered from it rather badly herself. "My father tells me that, when he was young, people used to say, 'Have you had your Ague this Spring?' My great grandfather said he would give up going to Court, as George III annoyed him by asking always about his Ague. "I cannot altogether believe Defoe's account in his "Tour Through the Whole Island of Great