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Central Germany, 180m asl., 21st May

I think it could be Anthomyzidae?

Thank you for your time!
-guido

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Syrphidae - Melanostoma sp.
I think the green haltere are characteristic of this genus but I haven't met all of the syrphids yet. I think that Melanostoma is correct.

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Wow... I've never thought of Syrphidae! Thank you very much indeed!
-guido

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If you check the Gallery, you will notice that most have 'ordinairy' yellow halters. I have long suspected that the green halters are a first indication of infection with Entomopthora.

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That is interesting! As this female seems t be about oviposition, do you think the offspring is going to be affected by this fungi?
-guido

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very interesting, Paul. I actually have a specimen with green haltere but I have yet to examine it. I will look for spores or signs of infection. I didn't know that the haltere are normally yellow. I am very interested in this subject. Thank you for posting, Paul. Fantastic info here :)

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Hello,

I read some time ago (unfortunately I don't know where anymore). that the halteres tend to become green on mature females when eggs are being developed.

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Thank you all very much for IDing. I enjoyed this fruitful discussion. I'll have an eye on green halteres oviposition and fungi-infestations. :-)

Best regards,
-guido

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This is Melanostoma scalare.

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Thanks for a species id, Stephane :)

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I've seen so green halteres of Melanostoma scalare only in case of two specimens catched toegether (in one place) in USA (Seattle region) very early spring. I thought it is geo-related. I see that from Europe for the first time.

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Hello Robert,



here in northwest Germany I often saw/see M. scalare with green halteres over years now. In the beginning I thought it was a difference from M. mellinum.