Thread subject: Diptera.info :: Bibio - but which specie?
Posted by ErikBo on 14-05-2026 09:00
#1
Can anyone help on identification of which specie of this Bibio it is? Pls also indicate what items to look for to distinguish the different species?
The insect was observed a warm day early may in south Sweden. /Thanks
Posted by ErikBo on 14-05-2026 09:46
#2
.. a second image - side view
Posted by John Carr on 14-05-2026 18:21
#3
Structurally,
Bibio species are distinguished by the relative lengths of the base of Rs and the r-m crossvein (usually about equal, sometimes much different), the form of the male hind basitarsis (long and slender to short and thick), and the relative lengths of the two spurs at the tip of the fore tibia (inner very short to as long as the outer).
Posted by ErikBo on 14-05-2026 19:39
#4
Thanks John for info,
I realise the photo is too coarse to make an id specification. Thanks for enlightening me.
BR Erik
Posted by Zeegers on 18-05-2026 08:41
#5
Are we sure it is not a Dilophus ?
Theo