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Thanks Syrphus for this (and for the A.haemmorhoa note). My mouse slipped on the subgenus - I didn't intend to use Agandrena! I've tried to run dead specimens (found on windowsill) through the trial keys from BWARS but they are hellishly tough to be really sure with (especially with just a handlens...)!
You don't need to repeat an ID either, especially at a lower confidence level - just agree if you want.
You can't ID Andrena with a hand-lens (not unless you have a lot of experience, when you can do a few confidently in the field). Wait for the definitive handbook, which is in prep. (but has been for a long time!). Then you will need a microscope as well. Worth it, though!
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 50.7648, -3.4389
OS grid ref: SX986971