The elytro-femoral stridulatory apparatus in Curculionidae (Coleoptera), with notes on the acoustic behaviour of Arniticus hylobioides (Boheman 1843) and Erodiscus proximus (Viana 1959), and thanatosis display in the latter species - Gaiger, Fábio; Vanin, Sérgio Antonio (Annales de la Société Entomologique de France (N.S.), 2006)