A new character for sex differentiation of adults of Anthonomus pomorum L-(Col., Curculionidae)

Microscopic examination of adults of the apple blossom weevil: Anthonomas p omorum L. reveals distinct differences between sexes in the last two (seven th and eighth) abdominal tergites. The last two abdominal tergites in males are clearly divided by a suture, whereas the division is not visible in fe males, in which these two tergites form a single triangular plate. In addit ion, the last (eighth) abdominal tergite of the male is covered with dense setae, and is about one-third of the size of the last abdominal plate of th e females. These differences permit sex differentiation of adult apple blos som weevils with complete accuracy.