Genus Tettigarcta White, 1845 (Hairy cicadas)
Members of this genus have greatly reduced sound producing organs in comparison with other cicadas and appear to be incapable of producing audible song. Instead they are believed to vibrate sound through the substrate in a fashion more typical of the Cicadellidae than the true cicadas. This genus can be easily distinguished from typical cicada genera by having a conspicuously large, shield-like pronotum, very close-set eyes (distance apart less than their diameter - Moulds, 1990), reduced timbals and no auditory tympana. It contains two species. One occurs in the alpine areas of south-eastern New South Wales and Victoria. The second species is restricted to Tasmania. For more detail see Tettigarctidae.
Distribution of the genus Tettigarcta
Alpine Hairy Cicada Tettigarcta crinita Distant, 1883
Alternative name: Hairy Cicada.
Size: Forewing length: 35-43mm.
Range and Season: A montane and alpine distribution from the Blue Mountains in New South Wales, south and west to the Otway Range in Victoria. It is a late season species, found from January through to about May.
Habits: Adults have strange behaviour for a cicada. They tend to be crepuscular and somewhat nocturnal, hiding in crevices and under loose bark during the day. This species prefers eucalypt forests and, in some areas, temperate rainforest.
Song: Hairy Cicadas communicate using vibration through the substrate rather than producing airborne song.
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