The dung beetles of the subgenus Proagoderus (genus Onthophagus) are desired by most insect collectors due to their special characteristics. They are all showing beautiful colors and nearly all males have the kind of horns which are simply fantastic. Some species are with deer-like horns whereas others have horns like rhinos. In connection with the bright colours these beetles are ideal objects for a picture catalogue such as the one we want to present. Several specialists and museums helped to bring together all species to be shown in this volume.