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As the frontal vitta is less than three times as broad as one fronto-orbital plate, it cannot be Musca domestica. So it is a female of either M. autumnalis or M. larvipara. According to the check-list of Norvegian Muscidae (https://www.resea...ae_Diptera) you have only M. autumnalis (and M. tempestiva that has a fully black abdomen). So M. autumnalis remains - nothing new for you (https://diptera.i...d_id=87233).