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Hi, I manged to rear 2 Chamaemyiids from a colony of quite big aphids on Fraxinus excelsior. Any suggestions how to make genitalia peparation? They are ~2.8 mm long. First time I take a photo of these with my new lens :)

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2

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3

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Looks like a Leucopis female - hope you managed to rear some males! (Great pics, by the way!)

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Hi! I proudly introduce the male:

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Terminalia (do they have to be disected?):

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Hi! after checking the drawings in the key for Hungarian Leucopis, I relaised that my specimens terminalia was not photogrpahed lateraly, so, here's a more lteral photo. I also compared it to all the speies, and found that neither resembled it. There's no one where surstylus is bent distally, and the paramers are also not even slightly resemble other species. What do You think?

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Now with the nice dissections of the male genitalia, things become clearer! This is Leucopis palumbi Rondani, 1872.

Raspi (1983 - Frustula Entomologica Nuova Serie 6 (19)) clarified the identity of this species, studying the types. Tanasijtshuk (1986) described this as a new species - his Leucopis ulmicola. The genitalic illustrations for both Raspi and Tanasijtshuk are identical to your images, and the descriptions and specimens I have match the external morphology perfectly too. And the puparium is rather unusual for Leucopis, but is just as described for this species.

This species is mainly known to attack galling "aphids" (pemphigids, eriosomatids, fordines) on Pistacia, Ulmus, Populus. But never Fraxinus up to this point - were these associated with galls? This is the first time known to be associated with aphids on Fraxinus, but a wider host range is not unexpected.

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Thank You very much! Is it already recorded from Hungary?

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I agree with Tony: Great pictures!! Perfect ones to add to the gallery!

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In the Hungarian checklist it is listed as 'to be expected'.

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Thank You everyone, so I'll write to Dr Papp, maybe he'll have time to care about this find. He wrote the key for the family (and lauxaniids) in Hungary. Right now I'm just abut to go photographing (I really would like to catch a Chyropteromyza at a cave where bats live - there's maybe some 0.5% chance as it was only found twice in my country) but when I come baxk I'll upload it.