A review of the phytophagous mites collected on citrus in the world is presented. The economic importance of citriculture and the economic effects of this important group of Arthropods on citrus are discussed. One hundred and four phytophagous species are treated, belonging to the families Phytoptidae Murray, Eriophyidae Nalepa, Diptilomiopidae Keifer, Tarsonemidae Canestrini and Fanzago, Tenuipalpidae Berlese, Tuckerellidae Baker and Pritchard and Tetranychidae Donnadieu. The information is summarized in tables, where the known species, their pest status and the geographic distribution are listed for each single family. For species with major, medium and minor pest status the fundamental aspects of bio-ecology, damage, natural enemies (mainly insects, mites, pathogens), and control are briefly presented. Also, are discussed the harmfulness of the more important species, and the aspects (systematic, bio-ecology, pest status, natural enemies, means of control, horticultural practices, prevention, and Integrated Pest Control) requiring solutions and appropriate lines of research.