1. Individual differentiation in behaviour of honey bee workers (Apis meltifera L.)

   • J. van der Blom

   Research Articles Pages: 345 - 361

2. Weight changes in adult hornets,Vespa affinis (Hymenoptera: Vespidae)

   • S. J. Martin

   Research Articles Pages: 363 - 368

3. Memory and chemical communication in the orientation of two mass-recruiting ant species

   • S. Aron
   • R. Beckers
   • J. M. Pasteels

   Research Articles Pages: 369 - 380

4. Landmark orientation during the approach to the nest in the stingless beeTrigona (Tetragonisca) angustula (Apidae, Meliponinae)

   • J. Zeil
   • D. Wittmann

   Research Articles Pages: 381 - 389

5. Defenders in the North American aphidPemphigus obesinymphae

   • N. A. Moran

   Research Articles Pages: 391 - 402

6. A latitudinal gradient in intensity of applying ant-repellent substance to the nest petiole in paper wasps (Hymenoptera: Vespidae)

   • Jun ichi Kojima

   Research Articles Pages: 403 - 421

7. Doronomyrmex pocahontas: not a workerless parasite but still an enigmatic taxon (Hymenoptera, Formicidae)

   • A. Buschinger
   • J. Heinze

   Research Articles Pages: 423 - 432

8. Intraspecific slavery inPolyergus rufescens Latr. (Hymenoptera, Formicidae): field and laboratory observations

   • F. Le Moli
   • D. A. Grasso
   • A. Mori

   Research Articles Pages: 433 - 437

9. Long-term impact of orphaning on field colonies ofCoptotermes lacteus (Froggatt) (Isoptera: Rhinotermitidae)

   • M. Lenz
   • S. Runko

   Research Articles Pages: 439 - 456

10. Acknowledgements

    Acknowledgments Pages: 457 - 457