The correlation between nutrition and reproduction with reference to two grouse locusts, EU$celimena harpaqo (Tetrigidae: Scelirneninae) and Potua sabulosa (Tetrigidae: Cladonotinae) is assessed. As far as Euscelimena harpaqo 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 as Potua 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 in P. sabulosa.

The grouse locusts (Tetrigidae) represent a group of small sized Caeliferan Orthoptera. These are considered to be primitive orthopterans related to Tridactylids on one hand to Acridids on the other. This family is represented in Indian subcontinent by about 90 species belonging to 35 genera. In the present study haemolymph protein profiles from 7 species from this family have been studied as an additional parameter to understand interrelationship amongst them. It is noted that the species Puratettix dorsifer and Euparat euix personatus belonging to the same subfamily Tetriginae show remarkable similarity in the haemolymph protein profile, thus justifying their e1assical taxonomical grouping. In case of subfamily Scelirneninae, however, of the 4 species studied 3 species viz Eucriotettix flaoopictus, Crioieuix latijrons and Thoradont a pruthii show a marked similarity, however Eucriotett ix harpaqo shows a pattern closer to that observed in the subfamily Cladonotinae. This implies that though by classical taxonomic criteria the 4 species are close to each other this may not be a very natural grouping.From this observation it becomes clear that help from additional parameters like protein profile studies, immunochcrnical studies, cytogenetic analysis, ctc will prove to be very valuable for the real understanding of phylogenetic interrelations and evolution of this family in particular and the status of grouse locusts vis-a-vis the orthopteran insects in general.

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