Main contributions to the maps :

BDFMG (2011)

Main collections studied (AP) : Belgium (Brussels, Gembloux, Mons); France (Paris, partim)

Main private collections studied: ...

Litterature: Blüthgen (1924); Ebmer (various papers, rare species only).

Remark: Distribution maps are relatively complete for rare species in southern Europe. They are compiled mainly from literature. Data are lacking on the maps for common species in central, northern, and eastern Europe.