1. Nest architecture inParischnogaster alternata Sakagami (Vespidae, Stenogastrinae), intra-specific variability in building strategies

   • C. Coster-Longman
   • S. Turillazzi

   Research Articles Pages: 1 - 16

2. Division of labor in post-emergence colonies of the primitively eusocial waspPolistes instabilis de Saussure (Hymenoptera: Vespidae)

   • S. O'Donnell

   Research Articles Pages: 17 - 29

3. Trail following and stowaway behaviour of the myrmecophilous staphylinid beetle,Homoeusa acuminata, during foraging trips of its hostLasius fuliginosus (Hymenoptera: Formicidae)

   • Y. Quinet
   • J. M. Pasteels

   Research Articles Pages: 31 - 44

4. Workers and queens of the European hornetVespa crabro L. have colony-specific cuticular hydrocarbon profiles (Hymenoptera: Vespidae)

   • D. P. Butts
   • M. A. Camann
   • K. E. Espelie

   Research Articles Pages: 45 - 55

5. On the elevated intestinal pH of higher termites (Isoptera: Termitidae)

   • D. E. Bignell
   • P. Eggleton

   Research Articles Pages: 57 - 69

6. Biology of the stingless beePlebeia remota (Holmberg): observations and evolutionary implications

   • F. D. J. van Benthem
   • V. L. Imperatriz-Fonseca
   • H. H. W. Velthuis

   Research Articles Pages: 71 - 87

7. Intraspecific competition through food robbing in the harvester ant,Messor aciculatus (Fr. Smith), and its consequences on colony survival

   • T. Yamaguchi

   Research Articles Pages: 89 - 101

8. Influence of larvae and workers on egg production of queens of the pharaoh's ant,Monomorium pharaonis (L.)

   • L. W. Børgesen
   • P. V. Jensen

   Research Articles Pages: 103 - 112