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 mainly in the hydrocarbon fraction of the cuticular wax. chemical composition of the hydrocarbon was a mixture of normal alkanes and methyl branched alkanes. The hydrocarbon fraction from male and female cuticular wax were identical in chemical composition and wing-raising activity.