Thread subject: Diptera.info :: Cerceris ?

Posted by BUCAILLE on 25-06-2020 17:28
#1

Hello
It's a Cerceris but who could help me to identify it. I would suggest C.quadrifasciata but I'm not sure. (I took other pictures if necessary).
North of France
Thanks for your help

www.galerie-insecte.org/galerie/image/dos261/big/P1100620.JPG
Denis Bucaille : France : Méry-la-Bataille : 60420 : 22/06/2020
Altitude : 123 m - Taille : 10 mm environ
Réf. : 261114

www.galerie-insecte.org/galerie/image/dos261/big/P1100614.JPG
Denis Bucaille : France : Méry-la-Bataille : 60420 : 22/06/2020
Altitude : 123 m - Taille : 10 mm environ
Réf. : 261113

Posted by eklans on 25-06-2020 19:20
#2

Hi Denis, I think it's C. arenaria - compare the stripes on the tergits and the hind femora.

Eric

Posted by BUCAILLE on 26-06-2020 14:32
#3

Hi Eric the yellow stripes on the tergits and the black apex of the hind femora are suitable for C.arenaria but I thought that C.arenaria has a yellow dot on the T1 ? Am I wrong Many thanks

Posted by eklans on 26-06-2020 19:29
#4

Hi Denis, I'm not sure, but I think the males don't:
https://www.bwars...s-arenaria

Eric

Posted by BUCAILLE on 27-06-2020 21:45
#5

Hi Eric
I understand that the hind femora of the C.quadrifasciata would be roughly totally black but the hind femora of C.arenaria would be yellow with a black apex, is it correct. I add below a new picture which could perhaps help to confirm definitely. Many thanks

www.galerie-insecte.org/galerie/image/dos261/big/P1100617.JPG
Denis Bucaille : France : Méry-la-Bataille : 60420 : 22/06/2020
Altitude : 123 m - Taille : 10 mm environ
Réf. : 261112