Inter‐generic differences in the metafemoral apodeme of flea beetles (Chrysomelidae: Alticinae)

The metafemoral apodeme, an essential element of the unique jumping mechanism in the chrysomelid subfamily Alticinae (flea beetles), was studied in fifty‐three Palearctic species of twenty‐six genera. Inter‐generic differences are noted and these genera separate into seven groups according to their apodeme structure. The significance of the metafemoral apodeme in phylo‐genetic relationships at the generic and subfamilial level is discussed.