The correlation between nutrition and reproduction with reference to two grouse locusts,Euscelimena harpago (Tetrigidae: Scelimeniae) andPotua sabulosa (Tetrigidae: Cladonotinae) is assessed. As far asEuscelimena harpago is concerned the impact of nutrition on reproduction is presented with reference to ovarian development in certain nymphal stages and in the adult. On the other hand, the impact is evaluated from an altogether different angle as far asPotua sabulosa is concerned. This pigmy locust prefers moss as food and tides over winter and hazardous summer as adult. During this period it almost does not feed. This peculiar feature is used as a parameter to assess the nature of impact inP. sabulosa.