The snake-like larvae of Cardiophorinae, commonly called wireworms, aresoil-dwelling or live in rotten decaying wood. They are elongate and smooth witha rather well-developed head with a prominentfrontoclypeus and peculiar, exter-nally toothed mandibles (Klausnitzer 1991-1999; Klausnitzer et al., 2000). Theyare highly mobile, moving with considerable speed through substrate. Some lar-valCardiophorinae are voracious predators, feeding on soil-dwelling insects andearthworms, although little is known about the specific insects upon which theyfeed. Antlion larvae are sand-dwelling insects and this paper documents the firstcase of a Cardiophorinae larva feeding on an antlion larva (Neu roptera: My r me -leontidae).Our knowledge of predation on both adult and larval antlions is limited, al -though adult antlions are considered to be prey for reptiles, birds, mammals, andmany invertebrates, including scorpions, spiders, and insects (Gepp and Holzel,1996; Gepp, 2010). Adults are also known to be consumed by robber flies anddragonflies, and predators with raptorial forelegs, such as mantids (Man todea)and mantidflies (Neuroptera: Mantispidae), have been observed to catch and eatadult antlions (Devetak, unpublished). Larval antlions in dry sandy habitats havebeen reported to be eaten by lizards, birds and hedgehogs (Gepp and Holzel,1996; Gepp and Klausnitzer, 2005; Gepp, 2010). Until now, stiletto fly (Diptera:Therevidae) larvae are the only recorded insect predator of larval antlions, asreported by Gepp and Klausnitzer (2005) on larvae of the European antlion,