The present work is devoted to achieve these objectives: Survey of the aquatic predaceous insects upon mosquito larvae and pupae. Study the life history and feeding habits of mosquito predator, Rhantus elevatus (Coleoptera, Dytiscidae) when reared on mosquito, Culex pipiens (Culicidae, Diptera) and Evaluation the effect of Bacillus on both C. pipiens larvae and the larvae and adults of its predator, R. elevatus. Ten species of predatory insects were found associated with mosquito larvae and pupae. These predatory insects are belonging to orders, Heteroptera, Coleoptera, and Odonata. This...