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I found this little fly (2mm) on a leave of black-currant (Spa, Belgium,29-05-2008).
What could it be ?

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Looks like a dolichopodid, walks like a dolichopodid and quacks like a ... no, hang on - I think I am confused :D

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I think it is the same like mine (http://www.dipter...d_id=13104), we have lots of them on the Magnolia leaves. Depending on the light they look blueish or greenish - shiny in any case. Sweet little things; Paul said: Chrysotus spec.
Regards, Sundew

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Entirely black legs, big antennal postpedicel, broad face vote for
Chrysotus laesus (Wiedemann, 1817) [Dolichopus] (Meigen, 1824: Syst.Beschr. 4: 43) *
=Dolichopus laesus Wiedemann, 1817: Zool.Mag. (Wied.) 1(1): 75 ** Type locality: Germany: Kiel. Palaearctic: Armenia; Austria, Belarus, Belgium, Bulgaria, China, Czech, Denmark, England, Estonia, Finland, France, Georgia; Germany, Hungary, Italy, N Kazakhstan, Latvia, Lithuania, Moldova; Netherlands, Norway, Poland, Romania; ; S Russia: Adygea, Dagestan, Krasnodar; N Russia: Karelia, Leningrad; Russia: Kursk, Lipetsk, Moscow, Voronezh, Yaroslavl, Tatarstan, Bashkortostan, Sverdlovsk, Chelyabinsk, Orenburg, Omsk, Tomsk, Barnaul, Irkutsk, Magadan, Krasnoyarsk, Blagoveshchensk, Vladivostok; Slovakia, Slovenia, Spain, Sweden, Switzerland, Tajikistan, Ukraine: Carpathiens, Cherkasy, Crimea, Kharkiv; "Yugoslavia" * Chrysotus

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Thanks