Paul Beuk wrote:
Male and female are different species, the male belonging to the rustioca group (sensu Chvála) the female belonging to the monogramma group (sensu Chvála; more yellowish species).
The male does not key out properly as rustica as the venter apparently is not black. Neither Chvála's key or Daugeron's key leads to a satisfactory identification, with the genitalia resembling those of meridionalis but the coxae being yellowish. Might well be an undescribed species.