| Summary: | The soft-bodied click-beetle genus <i>Malacogaster</i> Bassi, 1834 from the Mediterranean region has never been taxonomically revised to date. Information on its morphology, intra- and interspecific variability, systematics and distribution is fragmented and most species have not been properly studied since their description. Therefore, in this study we summarize all available information on the genus <i>Malacogaster</i>. Altogether, we recognize 10 valid species from the area including the Canary Islands, Iberian Peninsula, Balearic Islands, northern coast of Africa, Sardinia, and Sicily. <i>Malacogaster ruficollis</i> Dodero, 1925, stat. nov., which was originally described as a variety of <i>M. bassii</i> Lucas, 1870 and later synonymized with it, is considered a separate species. <i>Malacogaster parallelocollis</i> Reitter, 1894, syn. nov. and <i>M. olcesei</i> var. <i>reductus</i> Pic, 1951, syn. nov. are synonymized with <i>M. maculiventris</i> Reitter, 1894. <i>Malacogaster notativentris</i> Pic, 1951, syn. nov. and <i>M. olcesei</i> Pic, 1951, syn. nov. are synonymized with <i>M. passerinii</i> Bassi, 1834. Lectotypes are designated for <i>M. maculiventris</i> Reitter, 1894, <i>M. nigripes heydeni</i> Reitter, 1894, <i>M. parallelocollis</i> Reitter, 1894, <i>M. thoracica</i> Redtenbacher, 1858, <i>M. olcesei</i> Pic, 1951, and <i>M. rubripes</i> Peyerimhoff, 1949 to fix their identity.
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