Abstract
N. cinerea males raise their wings and tegmina at the recognition of mature females by contact chemoreception through their antennae. The chemical factors responsible for male wing-raising are presented mainly in the hydrocarbon fraction of the cuticular wax. Chemical composition of the hydrocarbon was analyzed and found to be a mixture of normal alkanes and methylbranched alkanes. The hydrocarbon fraction from male and female cuticular wax were identical in chemical composition and the wing-raising activity.
