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Keywords from Image Description:
BritishentomologyvolumePlate. en John Curtis British Entomology Folio Diptera Scaeva unicolor Scaeva pyrastri Concolourous Hoverfly The plant is Potentilla sterilis Barren Strawberry biodiversitylibrary org John Curtis PDold British Entomology Volume John Curtis Scaeva pyrastri Potentilla sterilis illustrations