The action of lecithin monolayers on mosquitoes I. General observations.

Monolayers of pure egg-lecithin at maximum equilibrium pressure were tested against eight species of mosquito in the laboratory, Anopheline larvae were prevented from surfacing and died in water of low dissolved oxygen content, but culicine larvae survived. The pupae of all species except Culex p. fatigans were killed. Effects on floating eggs, pupal-adult eclosion and adult behaviour are also reported.