In this volume the contributions provide the reader with full details of the development and structure of the nervous system both at the synaptic level and at the neuronal/interneuronal level. It provides details about aspects which insects have developed independently and, more importantly, aspects which they have in common with other classes. We know more about the detailed structure and function of the insect CNS than that of any other group of animals. Since the structure and circuitry are the major part in determining CNS function in motor control and coordinated movement, the insects lead the way over mammals and other vertebrates. This volume gives a clear and up-to-date account of the present state of knowledge and will be of value for many years to come.