I have been using RES Vol 9 part 3 to try and identify this Mycetophilidae caught in a light trap 5/6th Oct in East Lothian on a grassy strip next to mixed woodland. The key has taken me to genus Leia but I can't get any of the species to match. Can any one help ?
I suspect this is Greenomyia mongolica
Thank you for that ID. Looks good to me. That genus is not included in the RES key i was using, is there a more up to date one ?
The latest volume on Mycetophilidae (9, part 8) by Peter Chandler just covers the Mycetophilinae, so excludes Leia and related species. References about species that have been added to the British list (including Greenomyia) can be found in the latest checklist. See https://dipterists.org.uk/checklist