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Hello.
I took this male of Thereva on a blackberry leaf.
I'm using the Key to British Genera of Therevidae by Mike Hackston but I dont know if I'm right.

Locality : Flines-les-Mortagne, north of France (close to Belgium), Department 59.

Face and frons densily hairy, male not silvery => Genus Thereva.

Key for Males :
- Hind femur with 2 rows of bristles underneath near the base
- Hind femur with a single row of anteroventral bristles underneath near the base

=> There are 2 rows on my specimen, right ?



Julien Berné : France : Flines-lès-Mortagne : 59158 : 02/06/2026
Altitude : 21 m - Taille : 8-10mm
Réf. : 374183



Julien Berné : France : Flines-lès-Mortagne : 59158 : 02/06/2026
Altitude : 21 m - Taille : 8-10mm
Réf. : 374184