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Hi,
Can anybody help with determination of this fly species?
I take the photo on 19 May 2013 Kokkola, Finland.

Regards Pentti.

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Anthomyiidae.
Please can you show the chaetotaxy of all the legs (always very important in Anthomyiidae!), .........and if possible a better view on the genitals.


Johanna

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You showed a lateral and dorsal view, but we need a ventral view…..
I show you also an overview of the legs chaetotaxy.
Than I like to know how many pd, ad and av setae there are on the hindtibia and if the midtibia (beside the mostly normal ad and pd/pv setae), also has an av seta.

Also I show you how to pin the fly (on the side), so you easely can pull out the genitals with a minute pin.

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Example of a pinned fly

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Thank you very much for your help!
Regards.

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I am thinking about Paregle audacula, but than we have to see if the midtibia has an av seta, notopleuron is haired, and if there is a short orbital seta.

Johanna

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I agree with everything Johanna says. It is a tantalising antho fly, because the 6th tergite appears to be setulose, an unusual character. Finland has many rare and new species. The only way to get an ID is to run it down under the microscope, or dissect the end of the abdomen and examine the genitalia. If you can do this and make a photo of the genitalia and 5th sternite, I may be able to suggest a name?

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Unfortunately I failed to carry out the procedure you described and ruined the fly in the process. So I can't provide more pictures, sorry.

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With already pinned flies, you have to soften them first to change pins, otherwise they fall apart and the legs are laying everywhere, where you don't want them. (on the ground, into the carpet, etc...)
If you are serious interested for some procedures, you always can send me an PM.

Johanna

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I don't understand why you wanted to change pins with a dry specimen. Any attempt to hydrate the dried fly in water vapour (damp paper in jar) will generally end in failure. You would not have been able to pull out the genitalia, as in Johanna's photo, with a relaxed fly, only possible with a freshly killed one. All you needed to do was to break off the apical half of the abdomen with a pair of fine forceps (easy to do without damaging the specimen, do it under the microscope with a dish of alcohol underneath to catch the apical bit. Then soak it in sodium hydroxide (10%) for a few hours or days. Then you can dissect the postabdomen under the microscope Save it in glycerine after washing in water. Better still send it to me or Johanna in a small plastic vial before you dissect it