---

I found this fly in early September on a rotten log of a hybrid poplar, in the Parc de Woluwé in Brussels.
I cannot even put a family name on it, although ObsIdentify suggests it is a Helemyzidae... Any views on that?
A high resolution version of the picture is available here https://www.flickr.com/photos/42244964@N03/50338801192

best regards
Frank