Abstract: | Summary Three species of Cerambycidae and three of Chrysomelidae have been studied from the standpoint of the aedeagal musculature. A brief reference to this part of the anatomy in Bruchidae has also been made. On the basis of the present observations and earlier publications in this area a basic plan for the aedeagal musculature in Phytophaga could be inferred. Some major and minor modifications of the basic plan have been pointed out. It has also been inferred that ‘retournement’ of the aedeagus is a rule along Phytophaga. |