Diptera.info :: Identification queries :: Diptera (adults)
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 Between Rhagio vitripennis and scolopaceus
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| clovis |
Posted on 08-06-2016 13:53
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Member Location: North France, lille Posts: 910 Joined: 08.06.10 |
hi, I'm looking for differences between those 2 species as I think hairs on metapleuron isn't easy thing to see. Do you know if coloration of the anterior part of the wing is reliable? Between stigma and apex of wing.  clovis : France : Sainghin-en-Mélantois : 59262 : 21/05/2014 Altitude : 43 m - Taille : 15 mm Rhagio scolopaceus Réf. : 163597  clovis : France : Villevêque : 49140 : 16/05/2016 Altitude : 16 m - Taille : 12 mm Réf. : 163595 Rhagio vitripennis |
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| Paul Beuk |
Posted on 08-06-2016 15:49
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 Super Administrator Location: Netherlands Posts: 19240 Joined: 11.05.04 |
The darkening in the tip of the wing is not sharply demarkated in vitripennis but sharply demarkated in both scolopaceus and strigosus.
Paul - - - - Paul Beuk on https://diptera.info |
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| Zeegers |
Posted on 08-06-2016 17:02
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Member Location: Soest, NL Posts: 18538 Joined: 21.07.04 |
True, but Clovis is right that it is really tricky. First of all, always compare males with males and females with females, since females generally have darker wings than males. Second, the variability in this group is bigger than generally excepted. Thirdly, your identifications are correct. Unique for scolopaceus (together with latipennis) is the dark spot below the stigma, at the fork of vein R4+5. This spot is lacking in vitripennis and also in strigosa. As for your question, I need to look into that. Interesting observation. Theo |
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| John Carr |
Posted on 08-06-2016 17:52
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 Member Location: Massachusetts, USA Posts: 9866 Joined: 22.10.10 |
Is curvature of the base of R4 stable within a species? |
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| clovis |
Posted on 10-06-2016 22:41
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Member Location: North France, lille Posts: 910 Joined: 08.06.10 |
Thanks for your remarks, i didn't notice this spot. Could be a really usefull character. I'll check for the curvation, not sure it is stable, but worth cheking! Base of this questionning was this specimen (http://www.diptera.info/forum/viewthread.php?thread_id=73812), a female i first thought about R scolopaceus due to the large extension of the dark patch, but the shape of dark patch was in favour of R vitripennis, so i needed other opinion. That would be R vitripennis then. You largelly answer my question, so thanks!  (and thank if you check on other specimens, i tested it on only 10 vitripennis. Please tell me about the result) |
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| Zeegers |
Posted on 11-06-2016 08:00
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Member Location: Soest, NL Posts: 18538 Joined: 21.07.04 |
Hi Clovis, Your link is a circular one, probably you ment something else ! Theo |
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| Zeegers |
Posted on 11-06-2016 08:02
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Member Location: Soest, NL Posts: 18538 Joined: 21.07.04 |
Your dark anterior margin works excellent in this recent post http://www.diptera.info/forum/viewthread.php?thread_id=73856 Theo |
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| clovis |
Posted on 14-06-2016 19:49
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Member Location: North France, lille Posts: 910 Joined: 08.06.10 |
That was the exact post i wanted to show you^^ |
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| Zeegers |
Posted on 15-06-2016 07:48
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Member Location: Soest, NL Posts: 18538 Joined: 21.07.04 |
Yes, thank you very much for sharing !! I keep checking your feature, and so far 100 % score !! Theo |
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but don't see the image in the post.