Summary
The feeding behaviour of Oxycarenus laetus Kirby, Spilostethus pandurus var militaris (Fabricius) and Lygaeus hospes Fabricius; mating behaviour of Lygaeus hospes; ant mimicry in Metochus uniguttatus (Thunberg), Dieuches discoguttatus (Distant) and Poeantius festivus (Distant); Stridulation in Metochus uniguttatus and aposematic coloration in Elasmolomus sordidus (Fabricius) are described and discussed. Antennal perception of sex in Lygaeus hospes is determined by antennetectomy and eye-blinding experiments on the virgin adults.