The proceedings of the Ninth International Conference (Columbus, Ohio, 1994) contain 162 reports from leading acarologists from around the world. The twelve sections of the Congress and the number of papers in each are: behaviour and physiological ecology (21), parasitic acari and host-parasite relationships (9), mites and bees (11), control strategies for plant-feeding mites (24), morphology and phylogeny (25), genetics and population biology (10), acari and human diseases (11), mites and allergies (9), mites in aquatic habitats (6), mites in soil habitats (20), mites in stored products (4), and physiology and biochemistry (12).