Some Ideas Engendered by Recent Work on Malaria

no one can fail to be struck most forcibly with the clumsy costliness of the means by whicn present-day malaria control is effected. In his paper above referred to, the present writer has tried to show how delicate is the balance of the factors, the results of the inter' play of which permits a species to breed successfully. Since many of the actual factors are still to seek, their various energy-levels whicn result in a particular body of water becoming the breeding place of a particular species cannot yet be determined, but a start has been made, the goal of which is to prevent, cheaply and eft1" ciently, the " breeding balance" being attained for the breeding-place under attack. And no\v Colonel James, using wild mosquitoes caught aduit in their haunts, has attacked another side of the problem, taking it up from the point where the actual mosquitoes have been produced. At one particularly deadly spot in the hills of the Agency Tracts of the Madras Presidenc) the writer found a zygote rate of 12.5 per cen ? in a lot of A. funcstus captured in a camp, b1-1-