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Dear Claudia, they are all L. tentaculata both males and females.
Femles have median pruinose patch at level of 2nd and 3rd post dc more or less distinct. Also 3rd and 4th post dc clearly approximated. Also stront medialn dc on f3 is visible.
(Sometimes median pruinose patch is absent in females tentaculata, for this reason I made separete key fo rsuch females in Vikhrev (2011: Vikhrev N.E. (2011) Review of the Palaearctic members of the Lispe tentaculata species-group (Diptera, Muscidae): revised key, synonymy and notes on ecology. ZooKeys 84: 59-70. )But afterawards decide do not that.