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The Netherlands, Tilburg, 4-10.VI.2012.
Can anyone narrow it down a bit? Perhaps Iain?

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Detail

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Hi Jan Willem

I hope you are well. The specimen is fortunately one of the easier Lonchaeids to identify! - with short antennal flagellomere and long dorsal setulae half way along the apical segment of the aculeus it is Protearomyia nigra
best wishes ......... Iain

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Hi Iain,

I'm fine thanks. Hope you are well also!
Thanks a lot for the identification of the specimen. Species level is better than I expected :).

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Iain, with the longer dorsal apical setulae, is greciana not more likely? The British key does not show these dorsal apical setulae. I had a similar specimen from one of our museum windows today and greciana is where I ended up initially.

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Hi Paul

well spotted - I think there is actually an error in the key illustration as P. nigra does have a pair of long dorsal setae on the apical segmnet of the aculeus. One further complication is that I have found there to be a futher 3 undescribed species of Palearctic Protearomyia, one of which appears relatively common in western Europe - so at present although I can distinguish the males I am rather cautious about naming females!

best wishes ......... Iain

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I would not mind receiving some info on these other species and what might tell me the difference between females of greciana and nigra.
I collected two males this last weekend in Germany and it could mean additional material to study for you. :)