Diptera.info :: Identification queries :: Diptera (adults)
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| Josef Buecker |
Posted on 14-02-2008 10:38
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 Member Location: Hagen, Germany Posts: 616 Joined: 03.02.08 |
Hello Forum, one more fly from the alder marshland in Hagen (D) 175 m above sea level. This photo I took on June 12th 2007. The plant in the background is Urtica dioica. May be the fly belongs to Rhagionidae? Please help! Best wishes Josef Josef Buecker attached the following image:  [51.67Kb] |
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| Xespok |
Posted on 14-02-2008 11:10
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 Member Location: Debrecen, Hungary Posts: 5551 Joined: 02.03.05 |
Yes, this is a female Rhagionid fly.
Gabor Keresztes Japan Wildlife Gallery Carpathian Basin Wildlife Gallery |
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| Paul Beuk |
Posted on 14-02-2008 12:23
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Looks like R. lineola.
Paul - - - - Paul Beuk on https://diptera.info |
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| Andre |
Posted on 14-02-2008 14:01
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 Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
It looks too big for lineola to me, and the stigma is too big and black... Maybe notata or something, I would have to look it up back home. Do you have more pics of this one? |
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| Paul Beuk |
Posted on 14-02-2008 15:08
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
R. lineola has such a stigma, a greying mesonotum and I wonder how you can really determine the size of this specimen without point of reference.
Paul - - - - Paul Beuk on https://diptera.info |
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| Sundew |
Posted on 14-02-2008 15:29
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 Member Location: Berlin and Baden-Württemberg, Germany Posts: 3917 Joined: 28.07.07 |
Why "no point of reference"? You see two stinging hairs on the stem of the Stinging Nettle that have an average length of 1.5 mm. The stem diameter is about 3 mm. Now you can estimate the length of the fly  .Regards, Sundew Edited by Sundew on 14-02-2008 15:30 |
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| Andre |
Posted on 14-02-2008 15:54
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Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
Paul Beuk wrote: R. lineola has such a stigma, a greying mesonotum and I wonder how you can really determine the size of this specimen without point of reference. As you can read, dear Paul, I am saying 'looks'... Still, my gutfeeling tells me it's not lineola , for instance based on the color of the thorax  PS: herzlichen dank Sundew! 
Edited by Andre on 14-02-2008 15:56 |
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| Paul Beuk |
Posted on 14-02-2008 16:16
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Even nettles have small leaves...
Paul - - - - Paul Beuk on https://diptera.info |
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| Xespok |
Posted on 14-02-2008 17:00
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Member Location: Debrecen, Hungary Posts: 5551 Joined: 02.03.05 |
It does not look like lineola that I observed in Hungary. Lineola should have lighter legs. But maybe I am fooled by the photo.
Gabor Keresztes Japan Wildlife Gallery Carpathian Basin Wildlife Gallery |
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| Paul Beuk |
Posted on 14-02-2008 20:07
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Then it should be either R. notatus or R. conspicuus, either with dark femora I or with yellow femora I. Most likely the first one, then.
Paul - - - - Paul Beuk on https://diptera.info |
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| Andre |
Posted on 14-02-2008 20:25
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Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
Thank you Paul |
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| Sundew |
Posted on 14-02-2008 21:21
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3917 Joined: 28.07.07 |
Paul Beuk wrote: Even nettles have small leaves... That may occasionally be, but nevertheless the stinging hairs are quite standardized! (I did not speak of leaf size.)Sundew |
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| Josef Buecker |
Posted on 15-02-2008 16:34
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Member Location: Hagen, Germany Posts: 616 Joined: 03.02.08 |
Dear specialists, unfortunately I have only this one photo of the fly. Originally I thought it could be R. vitripennis. But I was too unsure to mention my opionion at all. Then, yesterday, I was so happy to get such a close determination by a specialist like Paul: R. lineola Now I am more than confused.Since I am a rather layman in this field of biology, I am not able to decide which one of the specialists is right or wrong. I will take the determination R. cf. notatus now. Thanks to all. Josef |
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| Tony Irwin |
Posted on 15-02-2008 17:03
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 Member Location: Norwich, England Posts: 7283 Joined: 19.11.04 |
It looks to me like this specimen has clearly darkened veins - I would have gone with something like vitripennis. But the best option is probably to call it Rhagio species and mark 12 June in your diary to return to the same marshland this year!
Tony ---------- Tony Irwin |
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| Andre |
Posted on 15-02-2008 19:29
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Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
The only species with such very dark legs and this kind of dusting is notatus. Vitripennis has strongly dusted thorax and almost yellow legs. Conspicuus has all yellow front legs and more dusting over the thorax. And lineola is absolutely out of the question... Scolopaceus has more clearly darkende veins and crossveins and yellowish legs. And this is the last I say about it...
Edited by Andre on 15-02-2008 19:36 |
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