Posted by maico on 30-03-2022 22:14
#1
From a suction sample from grassland in Sussex, Enlang last September.
I think G. hackmani but don't want to disregard G. balachowskyi quite yet...
Edited by maico on 30-03-2022 22:31
Posted by Jan Willem on 31-03-2022 08:14
#4
I think you are right, but to be sure you would need to study sternite 8 which is not visible in your picture (retracted). If you put the abdomen in KOH 10% for a few hours you may be able to pull out sternite 8 and study it.
The dark abdomen (normally, but not always, banded in
G. balachowskyi) seems to point to
G. hackmani. It also looks like the post-scutellum is rather dark, which also points to
G. hackmani.
Otherwise it's best to name it
Geomyza cf. hackmani.
Edited by Jan Willem on 31-03-2022 08:17