New records are provided for Muscidae from four different Mediterranean countries, with new distribution records for species in ten different genera. Seven species are newly recorded for Croatia, four species for Montenegro and one species for Bosnia & Herzegovina. In this paper we give the first confirmation of an aquatic larval stage for Lispocephalabrachialis (Rondani, 1877), Lispocephalaspuria (Zetterstedt, 1838) and Lispocephalamikii (Strobl, 1893). A first record of the species Coenosialyneborgi Pont, 1972 since its original description is also provided.
Keywords: Bosnia & Herzegovina; Coenosialyneborgi; Croatia; Limnophora; Montenegro; Sierra Nevada.