Primulaceae
Guides
Monostegia
Monostegia is a genus of sawflies in the family Tenthredinidae. The genus contains at least one well-known species, M. abdominalis, commonly called the loosestrife sawfly. Adults are characterized by black heads and thoraxes with yellow legs and abdomens. The genus has a holarctic distribution, originally native to Europe and Asia but introduced to North America in the 1950s, where it has since expanded its range considerably.