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Hello,

Please, can comeone help me to identify this fly (or even spider)?

Size: cca 2.5 mm?
Habitat: light forest with oaks, cherries and black locusts
Slovakia, Kosice, 300 m a s.l., July 2005

Spider prey is probably Formica sanguinea. The fly seems to be very impertinent, it feeds literally from spider mouth, :).

The situation is also here:
http://www.fotoaparat.cz/index.php?r=25&rp=209911&gal=photo

Thanks for any ideas.

Martin

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Another views

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The fly is a chloropid of the genus Tricimba. I have seen such behaviour in Desmometopa of the Milichiidae, but never in Chloropidae.

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Thaks a lot Paul!
I have also seen various flies in the vicinity of spiders with prey but this situation was very strange for me. In my photos there is probably also Desmometopa sp. on a honeybee attacked by the wasp Vespula germanica - I will sent it later.

Martin

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Desmometopa are very 'fond' of honeybee preys of spiders, robberflies and reduviid bugs.

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Thank you Paul for additional information. I am sending a Desmometopa (as I guess) in next thread.

Martin

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Hello!

Because nobody mentioned the spider: it's a crab spider (Thomisiidae) of genus Xysticus.

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Hello!
I seen very similar situation.

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That is Desmometope all right.

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The spider is Misumena vatia, I think.

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Yes. The spider of the year 2006;)

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Juergen, thanks for spider identification!
To Mielczarek: Very interesting photo, poor spider, :).

Martin