Diptera.info :: Identification queries :: Diptera (adults)
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 Therevidae
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| Dimitri Geystor |
Posted on 12-06-2006 08:52
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Member Location: Posts: 43 Joined: 03.03.05 |
Greetings, I'm seeking your advice on this determination. I first thought this fly to be Pandivirilia eximia (Meigen, 1820). Then, a member of the Insecte.org forum pointed out to me that, according to the determination key of Van Veen (which I was not aware of), P.eximia should not have a hairy face. http://home.hccnet.nl/mp.van.veen/therevidae/therevidae.html The key leads me to : 22.a. Tergite 4-6: lateral margin entirely shining black; thoracic dorsum with two yellowish grey longitudinal stripes and two pairs of dorsocentral bristles. 9-11 mm. -> Thereva cincta Meigen Your opinion would be greatly appreciated (click on the photos for enlarged view).  geystor : France : 11/6/2006 : Monsegur : 47150 altitude : 200 - taille : 15 mm ref=10044  geystor : France : 11/6/2006 : Monsegur : 47150 altitude : 200 - taille : 15 mm ref=10043  geystor : France : 11/6/2006 : Monsegur : 47150 altitude : 200 - taille : 15 mm ref=10042 This topic on insecte.org : http://www.insecte.org/forum/ressemble-a-une-asilide-mais-nen-est-pas-une-vt9519.html Thanks, Dimitri Edited by Dimitri Geystor on 12-06-2006 08:53 |
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| Paul Beuk |
Posted on 12-06-2006 09:03
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 Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
It resembles the one that was identified as Thereva auarata earlier, but maybe there are similar species around. See http://www.dipter...ead_id=477.
Paul - - - - Paul Beuk on https://diptera.info |
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| crex |
Posted on 12-06-2006 09:39
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Amazing photo of the head. May I ask what equipment you used for this? |
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| Zeegers |
Posted on 12-06-2006 21:20
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Member Location: Soest, NL Posts: 18787 Joined: 21.07.04 |
this is a Thereva no doubt. To tell the species, is more difficult. Theo Zeegers |
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| Dimitri Geystor |
Posted on 12-06-2006 21:25
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Member Location: Posts: 43 Joined: 03.03.05 |
Paul Beuk wrote: It resembles the one that was identified as Thereva auarata earlier, but maybe there are similar species around. See http://www.dipter...ead_id=477. Resembles, yes, but not identicatal by a long shot. Unless you consider that these variations in "fluffiness" and "fur color" are witnin acceptable bounds. Before posting my message I had examined the Thereva pictures on diptera.info, and discarded the aurata hypothesis. Well, there we are then, without a conclusive identification. Thanks a lot, nevertheless, Paul. Dimitri |
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| Dimitri Geystor |
Posted on 12-06-2006 21:29
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Member Location: Posts: 43 Joined: 03.03.05 |
crex wrote: Amazing photo of the head. May I ask what equipment you used for this? Sure. Canon 20D with Canon MP-E 65 mm macro lens. Composite picure treated with Helicon focus software for increased depth of field. Regards, Dimitri |
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