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Can we say, that the differents between M.autumnalis and M.larvipara is manly the lenght of the black hairs on the suprasquamal ridge ....
M.autumnalis = whit a group of black hairs
M.larvipara = black hairs on whole lenght

(Beside the differents of the lenght of the two flies...M.autumnalis 4,5-7,8 mm and M.larvipara 6-9 mm and M.larvipara is never spotted in the Netherlands)

And if so....are there not many mistakes between those two flies.


And Klaas...I have never heard of Musca sorbens...???

Only curious....JokeB)