Contents

Comparison of Morphology, Physiology and Development of the Receptor Organs 35

Introduction 35

The Receptor Organs 38

Location and Morphology 38

Postembryonic Development 42

Stimulus Transduction in the Receptor Organs 44

Frequency Tuning of the Receptor Cells 48

Projection of the Receptor Cells at the Ventral Nerve Cord Level 51

Auditory-Vibratory Interneurons in the Ventral Nerve Cord 51

Biophysics of Sound Production and Acoustic Behaviour 53

Introduction 53

Bushcricket Songs 53

Signal Transmission in the Biotope 56

Broadcasting and Acoustic Behaviour 56

Sound Production 57

Combined Resonant and Nonresonant Sound Production 57

The Role of Subtegminal Air Volume during Sound Production 62

Acoustic Behaviour 65

Species Discrimination 65

Summary and Conclusions 67

Comparison of Morphology, Physiology and Development 67

Sound Production and Acoustic Behaviour 68

Acknowledgements 69

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