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Taken in the mountains of Madrid on the 11th June 2011. ID would be much appreciated.

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Well, after so many months at least I have an idea of what it might be. Exorista? A male Exorista larvarum by any chance?

Thanks!

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I'd possibly go with Exorista but I only count 3 post-dc so perhaps it is one of the E.rustica group? If so then it would most likely be rustica but it would be impossible to prove it without seeing the male genitalia :)

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Thanks, Chris!! Pretty happy with the Exorista confirmation ;) Thought it might be larvarum simply because I already found one and was way too similar at first view. I see now Exorista are tricky ;) Haven't gone through any key and seems it is going to be nearly impossible with this one picture. So I will leave it as Exorista sp. if nobody else gives another opinion :)

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The most important split is between those with 3 post-sutural dc (the rustica group where females are unidentifiable and males need genitalia examination - rustica, tubulosa & mimula) and the ones with 4 post-sutural dc ... everything else, like larvarum, fasciata, glossatorum etc. :)

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Thanks once more, Chris!! I have checked what you tell me in my two Exorista flies and I see the difference at perfection :) That is great!! I have learnt the first step to separate Exorista species ;)

Best

Piluca