Elachiptera sp.?

 Have keyed this fly to Elachiptera but cannot find any online keys that go beyond genus. Can anyone advise if a key is available or assist with identification of this one please. Can upload additional photos if I know what features I am looking for. It was attracted to my moth trap in my garden in North Essex at the end of December 2021. Thorax is completely black.

Comments

The very long tubercles on the scutellum suggest that this is Elachiptera tuberculifera. Draft keys are available from John and Barbara Ismay (see Recording/Chloropid Study Group).