Larvae and adults of Gryllodes sigillatus (Walk.) were exposed to various photoperiods (10 h–18 h) to determine the influence of photoperiod on wing development. In the larva, a 14-h photoperiod was optimal for wing development and a 10-h photoperiod suppressed wing development completely. Adults exposed to a 14-h photoperiod produced more winged progeny than adults exposed to an 18-h photoperiod. Photoperiod therefore produces its effect on wing development both directly on the larvae and indirectly through their parents.