1. Interspecific aggression in colonies of the slave-making ant Harpagoxenus sublaevis

   • Jürgen Heinze
   • Diethe Ortius
   • Bert Hölldobler

   OriginalPaper Pages: 75 - 83

2. Larval behavior of predacious sister-species: orientation, molting site, and survival in Chrysopa

   • Lindsey R. Milbrath
   • Maurice J. Tauber
   • Catherine A. Tauber

   OriginalPaper Pages: 85 - 90

3. Social synchronization of the activity rhythms of honeybees within a colony

   • Brigitte Frisch
   • Nikolaus Koeniger

   OriginalPaper Pages: 91 - 98

4. Reproductive competition in queenless honey bee colonies (Apis mellifera L.)

   • Robert E. Page Jr.
   • Gene E. Robinson

   OriginalPaper Pages: 99 - 107

5. Inter-colonial selection for the maintenance of cooperative breeding in the ant Pristomyrmex pungens: a laboratory experiment

   • Kazuki Tsuji

   OriginalPaper Pages: 109 - 113

6. Phenotype-dependent arrival time and its consequences in a migratory bird

   • Anders Pape Møller

   OriginalPaper Pages: 115 - 122

7. Sperm transfer and storage in relation to sperm competition in Callosobruchus maculatus

   • Paul Eady

   OriginalPaper Pages: 123 - 129

8. Philopatry and mother-daughter associations in bushy-tailed woodrats: space use and reproductive success

   • Richard A. Moses
   • John S. Millar

   OriginalPaper Pages: 131 - 140

9. Male-male association patterns and female proximity in the guppy, Poecilia reticulata

   • Lee Allan Dugatkin
   • Robert Craig Sargent

   OriginalPaper Pages: 141 - 145