In order to understand the evolution and ecology of organisms, detailed data on the distribution and habitat preferences are essential. Although black scavenger flies (Diptera, Sepsidae) are common and abundant acalyptratae in European grass- and farmlands, a detailed understanding of their ecology and distribution is currently limited. This is particularly problematic since this taxon has received considerable interest in evolutionary ecology and continues to be studied in ecotoxicology and speciation. The aim of this study is to publish faunistic data, gathered from the extensive private collection of G. Bächli. Additionally, the occurrence of an additional species, Meroplius fukuharai, for Switzerland is documented.