Thread subject: Diptera.info :: Bibio in copula

Posted by pierred on 06-05-2021 11:53
#1

Hello,

[Click on the picture to get a better resolution. Click again to come back.]

www.galerie-insecte.org/galerie/image/dos280/big/5ds82331.jpg
Pierre Duhem : France : Saint-Leu-la-Forêt : 95320 : 03/05/2021
Altitude : 191 m - Taille : 7-8 mm
Réf. : 280954

The female:
www.galerie-insecte.org/galerie/image/dos281/big/5ds82331b.jpg
Pierre Duhem : France : Saint-Leu-la-Forêt : 95320 : 03/05/2021
Altitude : 191 m - Taille : 7-8 mm
Réf. : 281083

The male:
www.galerie-insecte.org/galerie/image/dos281/big/5ds82331c.jpg
Pierre Duhem : France : Saint-Leu-la-Forêt : 95320 : 03/05/2021
Altitude : 191 m - Taille : 7-8 mm
Réf. : 281084

I hesitate between B. lanigerus and B. johannis.

Is it possible to decide?
Thanks in advance.

Posted by eklans on 06-05-2021 13:23
#2

Hi Pierre, a lateral view would be nice but to decide between johannis & lanigerus: it's lanigerus: The wing membrane is brownish and the stigma poorly visible - in johannis the membrane is hyaline and the stigma dark brown and clearly visible. B. reticulatus (legs red) & varipes (stigma brown) excluded, too.

Greetings, Eric

Edited by eklans on 06-05-2021 13:33

Posted by pierred on 06-05-2021 14:45
#3

Thanks a lot.