The Balkan populations of m>L. sinapism> and m>L. juvernicam> are not genetically differentiated from other mainland populations.

In the Balkans, m>L. sinapism> is a widespread habitat generalist; m>L. juvernicam> exhibits a transition from a habitat generalist in the west to a localised habitat specialist in the east.

Morphometric analysis of the male genitalia reveals a mosaic of regional morphological variation.

The morphological variation is not correlated to DNA and is likely a result of environmental and ecological factors.

A simple and efficient discriminant function is derived based on the genitalia scaling relations.