Detailed external structures of mature larvae of two subcortical species, Nudobius lentus (Gravenhorst) and Gabrius splendidulus (Gravenhorst), are re-described and illustrated based on light and scanning electron microscopy. A combination of characters to distinguish the mature larvae from those of other genera within the tribe Xantholinini for N. lentus, and the subtribe Philonthina for G. splendidulus is presented. Diagnostic larval characters to identify species and genera are given.
Keywords: Coleoptera, rove beetle, subcortical, saproxylic, N. lentus, G. splendidulus, Scolytinae.