Trigonidium cicindeloides explained

Trigonidium cicindeloides is a small beetle-like species of sword-tail crickets, widespread in Africa, southern Europe, and southern Asia.^[1] During mating season males make a sound created by vibrating the last two joints of their maxillary palpi. This is either to attract females for mating or to drive off other males.^[2]

Notes and References

1. http://orthoptera.speciesfile.org/Common/basic/Taxa.aspx?TaxonNameID=1127295 Orthoptera Species File: Trigonidium cicindeloides
2. Ingrisch, S. (1977). Das Stridulationsorgan der Käfergrille Trigonidium cicindeloides (Orthoptera: Gryllidae: Trigoniinae) und Beobachtungen zur Eidonomie und Ethologie. Entomologica Germanica, 3, 324-332.