Faunistic survey of myrmecophilous and other ant-associated beetles and spiders in the Belgian province of Limburg (Araneae, Coleoptera, Hymenoptera: Formicidae) Berx, Peter Bosmans, Bart Dekoninck, Wouter Janssen, Marc Stassen, Eugène Crevecoeur, Luc Belgian Journal of Entomology 2023 2023-10-06 141 1 61 8VR6D Latreille, 1802 Latreille 1802 [601,986,1145,1174] Insecta Staphylinidae Animalia Coleoptera 41 42 Arthropoda subFamily Staphylininae  Ninety-two individuals of  Platydracus stercorarius(Olivier, 1795)( Fig. 35E) have been found in 30 1 x 1 kmsquares, with 83 collected with pitfall traps (Annex).  Platydracus stercorariusis an impressive rove beetle reaching 20 mmand is associated with  Tetramorium caespitum, F. rufaand several species of the genus  Myrmicaand  Lasius( PÄIVINEN, 2002). According to Donisthorpe (1927)this beetle penetrates the ant nests to feed on the ants and their brood. It is worth mentioning the fact that it is the only myrmecophilous beetle ever found in the nests of our rare slave-making Amazon ant  Polyergus rufescens(Latreille, 1798) ( ANDRÉ, 1874, p. 213). Two locations where this rove beetle has been observed, Hageven in Pelt and De Teut in Zonhoven, are two of the five areas in Belgiumwhere likewise the rare Amazon ant is found ( DEKONINCK et al., 2001; VANKERKHOVEN et al., 2021).