Morphologie und Systematik der Larven der Unionicola-Arten (Hydrachnellae, Acari) Deutschlands. - Iп Germany are occuring 11 Unionicola species. Iп the present paper the larvae of аН except и. jiguralis are morphologically characterised. Characters of importance are the coxal plates, the genital field and the length of legs. Тhе few figures that exist in the literature are listed and discussed. А key to species in the subgenera Pentatax and Parasitatax is presented. For Unionicola crassipes, U. тinor, U. gracilipalpis and U. parvipora the key leads only to their соmmоп subgenus, Unionicola s. str.