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Abstract

The social behaviour of two Elasmucha species (E. grisea and E. fieberi) manifested in a parental care with a high effectiveness was studied in the surroundings of Würzburg and analysed in the laboratory. ♀♀ exhibiting various methods of defence are able to find their eggs after removal; an olfactory or chemotactile orientation is involved. A distinct grouping behaviour of the young larvae is well adapted to the parental care. There is no species specifity in the guarding of the eggs and larvae as well as in the larvae-groups.