Posted by Tony Irwin on 17-02-2021 20:57
#2
Not
Phora (which tends to be matt black in colour, and has a more concave occiput). I think this is probably
Megaselia, but usually you need a specimen to see all the features required for generic determination.
You can order a copy of Henry Disney's key to British genera (and species other than
Megaselia) from
https://www.royen...-megaselia - slightly damaged stock so very low price.