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Hi Jeremy

Yes, this is Leucostoma and yes, males are very difficult to identify.
Do you have more species ??
If so, we'd really need a good look at the latter tergites in ' dorsal' view.
Do you have the key to Central Europe (Tschorsnig & Herting) ?

The difference in dusting on the head can only be found by playing with the light and shifting angles: impossible to see in a still.


Theo