Jun-ichi KonMA2),Deparnnent ofBioltrgy, Flezcully ofSeience.1hriraki Uhiversity. Mite 3IO ftf7titir.CfOMptMtr:tstt6tL*opesrek67v swas utlrd<#g\zztseiattta! alli rs tw -Symopsis KorrMA, Jun-ichi (Dept. Biol., Fac. Sci., Ibaraki Univ., Mito). 19S3. Defense of the pre-erriergeipe colony against ants by rneans of a chemical barrier in Ropafidla .fasciata (HYrrienoptera, Vespidac). Jap. J. Ecol.. 33:213-223. Ropaiidlafosciata (F.) females rub the basa1 tuft of the tcmima1 gastral sternite against

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... petiole of the nest, Foundresses of mature single-foundrcss colonies <with pupae and/or final-instar larvae) rubbed more frequently than those of young single-foundress colonies (with eggs andlor first-instar ]arvae). The close temporat association of rubbing with ]icking on the petiole is likely to contribute to