---

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

---

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.

---

Amazing photo of the head. May I ask what equipment you used for this?

---

this is a Thereva no doubt.

To tell the species, is more difficult.


Theo Zeegers

---

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

---

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