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Dear forumists,

We in Finland have some problems in determining male specimens of Ischiolepta (Sphaeroceridae) somewhere around the species crenata/micropyga. The pictures of male genitals of these species aren't illustrated in the British monograph, only some other species of this genus are included.

Does anyone know any article where there are pictures of male genitals of these two Ischioleptas?

Also other comments on differentiating these two ones are gratefully welcomed,

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HO-YEON HAN & KE CHUNG KIM, 1990. Systematics of Ischiolepta Lioy (Diptera : Sphaeroceridae). - Annals of the Entomological Society of America 83, no3, pp. 409-443. Not available online, I'm afraid and I have not yet come round to digitizing my photocopy (which is still in a store box in the office).

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So many thanks Paul (I kind of doubted you might be one who would first react here:), perhaps we should order it via our local library...

There is at least one species in Finland which at least I have doubted to be crenata, having a slightly fork-resembling two-spiked end of male surstyli, but currently the question has arisen whether micropyga could also be present here.

Have you perhaps encountered both of these two in Central Europe?

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I have not encountered many ischiolepta at all (probably due to the way I collect) and the ones I have seen were other species or females.