Bioacoustics of Gryllus (Gryllus) bimaculatus

Recognition characters and song. Apparently the most widely, naturally distributed Gryllus species found from the tip of South Africa north into Europe and east as far as Thailand ( Otte & Cade 1984 ). This is a medium-large sized, short hind femur, usually pure black, short or long hind winged cricket with a shiny pronotum. Most males have a pale, yellowish area ( Fig. 11a ) at the base of each tegmen where they attach to the pronotum. Adult females may be without or have a slight indication of pale tegminal areas ( Fig. 11b ). Brown males are known (see Fig. 11 a , and Otte and Cade 1984). Song ( Figs. 12 , 13; R12–14 ) with 2–6 pulses/chirp, usually 3–5 chirps/second, pulse rate 21–28 at 25°C, dominant frequency 4633–5816 Hz in pet store specimens.