2006 375 p., 140 plates, 330 distribution maps, hardbound. In French and English. Library stamps, else very good copy.A brief introduction in German, French and English precedes the English/French determination key. Illustrated by 34 plates of line drawings, this key allows the determination of the specimens down to the genus level. The 106 plates showing important details will then lead the reader to the species observed in Switzerland. This key is completed for each species by a distribution map and two diagrams, showing the vertical distribution by thermal level, the other the phenology, the number of observations and their seasonal distribution.