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I am pretty sure it is a male Graphogaster vestita ;) It was found last year in Almeria, Chris and Theo IDed it in Diptera.info it and many pictures of it have been taken in the area this year. It is rather characteristic once you know it. It seems to be rather common in SE Spain.

Have a look at this thread:

http://www.dipter...d_id=43187

Great picture! Gallery, please! ;)