Diptera.info :: Identification queries :: Diptera (adults)
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 Homalocephala biumbrata
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| crex |
Posted on 06-07-2008 18:02
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Location: Midwest Sweden (Dalsland) Date: 2008-JUN-18 Size: ~5-6 mm (estimated) This fly walked back and forth of a fallen trunk (alnus or maybe aspen) and displaying its wings, sometimes both at the same time and sometimes only just the right or the left wing. It wasn't waving the wings like Sepsis, but unfolding them like a pocket knife unfolds a blade. A few times when it got disturbed it slided away side-ways from me instead of just flying off. It was moving most of the time making it hard to focus the camera. I thought all these four photos where of the same fly, but now I start wondering about the last one (pic #4). Notice the white? spikes in the back of the head on pic #3. It resembles Prochyliza a bit, but I ain't sure about the family. crex attached the following image:  [175.37Kb] Edited by crex on 26-08-2008 21:56 |
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| crex |
Posted on 06-07-2008 18:02
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Pic #2
crex attached the following image:  [155.84Kb] |
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| crex |
Posted on 06-07-2008 18:03
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Pic #3
crex attached the following image:  [170.72Kb] |
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| crex |
Posted on 06-07-2008 18:03
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Pic #4
crex attached the following image:  [166.77Kb] |
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| phil withers |
Posted on 07-07-2008 22:07
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Member Location: Lyon, France Posts: 521 Joined: 04.03.08 |
This might be Homalocephala (Ulidiidae): the white bristles and the absence of a marking in photo 4 may just be lighting effects. If so, a good find as these are rare. |
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| crex |
Posted on 07-07-2008 22:33
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Thanks Phil! In case you are right there are 7 species recorded from Sweden: - Homalocephala albitarsis - Homalocephala angustata - Homalocephala apicalis - Homalocephala bimaculata - Homalocephala biseta - Homalocephala biumbrata - Homalocephala mamaevi |
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| jorgemotalmeida |
Posted on 07-07-2008 23:43
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
wait for Valery.  |
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| crex |
Posted on 08-07-2008 07:12
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
I am and I have several threads that need an answer, but I realize even the heavy dudes must have vacation, specially this time of year  |
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| crex |
Posted on 26-08-2008 20:20
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Any Ulidiidae experts on board now? |
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| Nosferatumyia |
Posted on 26-08-2008 20:53
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 Member Location: Posts: 3575 Joined: 28.12.07 |
Almost certainly Homalocephala biumbrata Wahlberg. @Almost@ is because halteres are not visible; Elena Kameneva det.
Val |
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| crex |
Posted on 26-08-2008 21:55
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Thank you very much and send my regards to Elena. I attach an additional terrible photo, but maybe enough to show the whitish haltere. I think the light haltere also shows through the wing on the other photos as well. I hope this confirms the determination
crex attached the following image:  [135.41Kb] |
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| Nosferatumyia |
Posted on 26-08-2008 22:11
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Member Location: Posts: 3575 Joined: 28.12.07 |
yesss!
Val |
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| crex |
Posted on 26-08-2008 22:41
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Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Thanks again!  |
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