This website has been prepared thanks to a grant allocated by the Belgian Science Policy,a grant allocated by the Parsyst and Collparsyst project allocated by the Museum national of Natural History of Paris, France and a Synthesys grant allocated by the Natural History Museum (London), the Humboldt University of Berlin and the Museum of Paris. We are grateful to Mr Raoul Gerend (G.D. of Luxemburg) for the addition of his collection data.