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I ran it through the Elachiptera key and got to

Male femoral comb with 40-50 setae in an irregular patch: cornuta
Male femoral comb with under 20 setae in two discrete rows: sp. near cornuta

I've added another photo which, with a bit of imagination, shows two rows of pegs on the top of the middle femora, so if this is the femoral comb, I suppose it is "sp. near cornuta". Does the Fauna Ent. Scand volume have any mention of this, please?

John