Thread subject: Diptera.info :: Which Chrysotoxum?

Posted by clovis on 19-11-2015 00:23
#1
Hi everyone,

Here is a Chrysotoxum i met last year in massif central, in France, 1300m hight.
Unfortunately i didn't catch it. And i don't feel confortable identifying this genus on picture.
What do you think?

www.galerie-insecte.org/galerie/image/dos153/big/lachamp_raphay_l.jpg
clovis : France : Lachamp-Raphaël : 07530 : 11/08/2014
Altitude : 1382 m - Taille : 12mm
Réf. : 153235
www.galerie-insecte.org/galerie/image/dos153/big/lachamp_raphay_lr.jpg
clovis : France : Lachamp-Raphaël : 07530 : 11/08/2014
Altitude : 1382 m - Taille : 12mm
Réf. : 153236
Edited by clovis on 21-11-2015 18:05

Posted by Sundew on 24-11-2015 16:02
#2
Provided that the 3rd antenna segment is shorter than segment 1+2 (difficult to estimate here) and the femora 1 and 2 have a black basis, it is the spring species Ch. vernale. Completely yellow femora would make it Ch. festivum. The latter can be found till September, which would match better the time of your observation. There is a dark spot on femur 1 in pic 1, however... A Syrphid expert should possibly see more!
Regards, Sundew

Posted by evdb on 07-03-2016 17:17
#3
I am not an expert but I would have said C. festivum too.

Posted by clovis on 26-03-2016 21:05
#4
Oups, forgot this thread! :o

Thanks for your opinion. Unfortunately I have no better picture of femora, but festival looks like a good idea to me too.
Edited by clovis on 26-03-2016 21:08