Posted by Liliane D on 22-03-2021 09:37
#5
In the gallery I see
Empis tesselata which have this orange spot at the apex of the femurs.
https://diptera.info/photogallery.php?photo_id=74
Other
Empis tesselata do not have these spots : https://diptera.info/photogallery.php?photo_id=7415
So it might not be a criteria for exclusion, nor for confirmation.