Oscillograms of the calling song A, B courtship song C–H and frequency spectra I, J in Mesasippus kozhevnikovi. Courtship songs of two males are shown in D and G. Song recordings are presented at three different speeds. In all oscillograms the two upper lines are recordings of hind leg movements and the lower line is the sound recording. Frequency spectra are shown in kHz for the short syllables I and the main echeme J of courtship.