This monograph represents the current status of neuro ethological research on the diurnal behavior of the stick in sect, Carausius morosus. The growing profusion of inter related studies, many of which are published only in German, makes an overview of this field increasingly difficult. Many stick insect results contribute to general problems like con trol of catalepsy, control of walking, program-dependent reactions and control of joint position. For this reason I decided to compile and synthesize the results that are pre sently available even though the analyses are far from con cluded. In...