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Diptera.info :: Identification queries :: Diptera (adults)
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Face to face ? fly vs. spider
Martin Suvak
#1 Print Post
Posted on 27-12-2006 12:48
Member

Location: Slovakia
Posts: 51
Joined: 02.11.06

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, Smile.

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

Thanks for any ideas.

Martin
Martin Suvak attached the following image:


[101.18Kb]
 
Martin Suvak
#2 Print Post
Posted on 27-12-2006 12:49
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Location: Slovakia
Posts: 51
Joined: 02.11.06

Another views
Martin Suvak attached the following image:


[113.27Kb]
 
Paul Beuk
#3 Print Post
Posted on 27-12-2006 13:05
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Location: Netherlands
Posts: 19403
Joined: 11.05.04

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

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Martin Suvak
#4 Print Post
Posted on 27-12-2006 13:34
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Location: Slovakia
Posts: 51
Joined: 02.11.06

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
 
Paul Beuk
#5 Print Post
Posted on 27-12-2006 15:17
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Location: Netherlands
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Desmometopa are very 'fond' of honeybee preys of spiders, robberflies and reduviid bugs.
Paul

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Martin Suvak
#6 Print Post
Posted on 28-12-2006 13:57
Member

Location: Slovakia
Posts: 51
Joined: 02.11.06

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

Martin
 
Juergen Peters
#7 Print Post
Posted on 28-12-2006 18:56
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Location: northwest Germany
Posts: 14399
Joined: 11.09.04

Hello!

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

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Juergen Peters
Borgholzhausen, Germany
WWW: http://insektenfo...
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Lukasz Mielczarek
#8 Print Post
Posted on 28-12-2006 19:21
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Location: Poland, Krakow
Posts: 498
Joined: 27.09.06

Hello!
I seen very similar situation.
Lukasz Mielczarek attached the following image:


[167.94Kb]
 
Paul Beuk
#9 Print Post
Posted on 28-12-2006 22:42
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That is Desmometope all right.
Paul

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crex
#10 Print Post
Posted on 29-12-2006 07:29
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Location: Sweden
Posts: 1996
Joined: 22.05.06

Mielczarek wrote:
Hello!
I seen very similar situation.


The spider is Misumena vatia, I think.
 
Lukasz Mielczarek
#11 Print Post
Posted on 29-12-2006 10:31
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Location: Poland, Krakow
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Yes. The spider of the year 2006Wink
 
Martin Suvak
#12 Print Post
Posted on 29-12-2006 10:53
Member

Location: Slovakia
Posts: 51
Joined: 02.11.06

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

Martin
 
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