With 233 species worldwide Haliplidae are just a small family of water beetles. Although many papers have been published about these beetles, an illustrated guide covering all the world's species has never been issued, but now it is here! General information and specific details are presented for each species, elucidated with line drawings, colour photographs and distribution maps for each species. For professionals as well as non-professionals which may encounter Haliplidae from any where in the world in their research, expeditions, in museum collections etc. this book offers a valuable entrance to this subject and a ideal way for identification to species-level.