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Hello,

I don't really know where to start to find the genus of this fly.
I notice very long bristles on the costa and what looks like a longitudinal keel on tibiae 1 and 2 but I don't know if that helps.
I thought maybe Phora or Megaselia, but I don't know how to tell them apart and confirm a genus ?



Jessica Joachim : France : Serviès : 81220 : 13/02/2021
Altitude : 300 m - Taille : 3 mm environ
Réf. : 275928


Jessica Joachim : France : Serviès : 81220 : 13/02/2021
Altitude : 300 m - Taille : 3 mm environ
Réf. : 275929

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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.

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Okay, thank you very much.
Thanks for the link, I bought it !