Figwort Sawfly? but what about the antennae?

Figwort Sawfly? but what about the antennae?

Observation - Figwort Sawfly? but what about the antennae?. Description: Photographed on Figwort or Water Figwort. Looks like the many photos online of Tenthredo scrophulariae except that none I've seen show the very distinct dark tips to the antennae that this individual had. Can anyone explain?

Photographed on Figwort or Water Figwort. Looks like the many photos online of Tenthredo scrophulariae except that none I've seen show the very distinct dark tips to the antennae that this individual had. Can anyone explain?