The larval water mites live as ectoparasites on different insect hosts(Collembola, Odonata, Plecoptera, Heteroptera, Thysanoptera, Coleoptera,
Diptera, Trichoptera). The most important host group are chironomid nematocerans. In the present database for all water mites the existing references on host species are listed. Only water mite species and genera from the West Palaearctis are included.The construction of this database was financially supported by the foundation PAB last update 11th Jan 2002