Blaps is the most species-rich genus in the subtribe Blaptina, with 220 described species. In this study, we constructed a preliminary phylogenetic framework for 23 Blaps species inferred from a fragment of the mitochondrial COI gene. Based on the phylogenetic topology and the results of three molecular species delimitation analyses, three larval specimens are assessed for the adults. Additionally, the larvae of these three species are described and illustrated: Blaps (Ablapsis) apicecostata Bair, 1922, Blaps (Ablapsis) brevipes Seidlitz, 1893, and Blaps (Blaps) moerens Allard, 1880. A key to the known Blaps larvae is provided.