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It isn't easy with this blue things.
My idaes:
1. I can't choise between Protophormia terraenovae (pro - too dark and thorax looks flatterned) Lucilia sp. (pro - too white face and it becames too late for Protophormia).
2. I think Cynomyia mortuorum, Calliphoridae. But with atypicaly white (not yellow face).
3. I think you are right Dasyphora/Eudasyphora, Muscidae.
Nikita