1. Mesostigmata as Biological Control Agents, with Emphasis on Rhodacaroidea and Parasitoidea -- 2. Potential of Ascidae, Blattisociidae and Melicharidae (Acari: Mesostigmata) as biological control agents of pest organisms -- 3. The potential of free-living Laelapid mites (Mesostigmata: Laelapidae) as biological control agents -- 4. Macrochelid Mites (Mesostigmata: Macrochelidae) as Biological Control Agents -- 5. The Phytoseiidae (Acari: Mesostigmata) as biological control agentes -- 6. Prostigmata (Acari: Trombidiformes) as biological control agentes -- 7. Stigmaeidae -- 8. The Erythraeoidea (Trombidiformes: Prostigmata) as biological control agents, with special reference to the genus Balaustium -- 9. The Cheyletoidea (Prostigmata), with special reference to the potential of Cheyletus malaccensis Oudemans as biological control agent of post-harvest pests -- 10. Food Web Engineering to Enhance Biological Control of Tetranychus urticae by Phytoseiid Mites (Tetranychidae: Phytoseiidae) in Citrus -- 11. Past, Present and Future: Biological Control of Spider Mites on California-grown avocados -- 12. Mite Pathogens and their use in Biological Control.