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Hello Dennis,

It's not a she, but a he. And he is a Syrphidae indeed. A male Cheilosia morio. Nice find. Within the genus this species has a quite different larval habitat. Normally Cheilosia species live within herbs. But the larvae of C. morio live in exuding sap from Picea trees.
For comparison here's some photo's from the Netherlands:
https://waarneming.nl/soort/photos/197804
And here's the paper reporting the species new for the Netherlands (with English summary): http://www.repository.naturalis.nl/document/555357
It seems to be expanding its range in Europe.

Greetings,

Ectemnius