Thread subject: Diptera.info :: Bibio - Bibio brunnipes
Posted by Morten A Mjelde on 14-09-2025 22:49
#1
I have keyed this according to NORWEGIAN INSECT TABLES and think it fits best with Bibio brunnipes. But I read that brunnipes should have reddish-yellow hind femurs. This one is reddish only the inner part of the femur. It was found in a mountainous area in Southern Norway on July 26th.
Edited by Morten A Mjelde on 16-09-2025 18:13
Posted by Morten A Mjelde on 14-09-2025 22:49
#2
2
Posted by Morten A Mjelde on 14-09-2025 22:50
#3
3
Posted by Zeegers on 15-09-2025 16:03
#4
except for the date, I see a straightforward B. lanigerus, but that might just be me.
Why not lanigerus ?
Theo
Posted by eklans on 15-09-2025 17:18
#5
That's why you can, but I could't:
Zeer talrijk, eigenlijk overal in grote aantallen aan te treffen
van eind.iii - midden.v
Posted by Morten A Mjelde on 15-09-2025 19:23
#6
Thank you! I agree, but the date and the altitude (about 1000 m asl) are strange. The first hind tarsal joint should also have been thicker, I think.
Morten
Posted by Fred Fly on 16-09-2025 10:56
#7
I compared material of B. lanigerus and B. brunnipes from my collection. B. lanigerus is a long and dense haired species especially on lateral margins of first tergites, thorax, back auf head and legs, while B. brunnipes is allways thin and short haired as shown on the photographes. In addition the specific shape of front an hind tibia showing that is B. brunnipes. The shape of basitarus of hind tarsi seems to be quite variable in B. lanigerus. In my material the latest collecting date of B. lanigerus in higher altitude (1750 m) at snow border in 2024 was 10th of May.
Regards
Posted by Morten A Mjelde on 16-09-2025 18:13
#8
Very interesting! Thank you very much!
Morten