1. Cycads: their evolution, toxins, herbivores and insect pollinators

   • Dietrich Schneider
   • Michael Wink
   • Philip Lounibos

   Review Article Pages: 281 - 294

2. The origin of extensive colour polymorphism in Plateumaris sericea (Chrysomelidae, Coleoptera)

   • Masashi Kurachi
   • Yasuharu Takaku
   • Takahiko Hariyama

   Short Communication Pages: 295 - 298

3. Hot spots in the bee hive

   • Brigitte Bujok
   • Marco Kleinhenz
   • Jürgen Tautz

   Short Communication Pages: 299 - 301

4. A queen pheromone induces workers to kill sexual larvae in colonies of the red imported fire ant (Solenopsis invicta)

   • Emily A. Klobuchar
   • Richard J. Deslippe

   Short Communication Pages: 302 - 304

5. Gamergates in the myrmicine genus Metapone (Hymenoptera:Formicidae)

   • Bert Hölldobler
   • Jürgen Liebig
   • Gary D. Alpert

   Short Communication Pages: 305 - 307

6. 2-Nitroethenylbenzenes as natural products in millipede defense secretions

   • Yasumasa Kuwahara
   • Hisashi Ômura
   • Tsutomu Tanabe

   Short Communication Pages: 308 - 310

7. Attraction of the tropical bont tick, Amblyomma variegatum, to human breath and to the breath components acetone, NO and CO₂

   • C. McMahon
   • P. Guerin

   Short Communication Pages: 311 - 315

8. Inter-cellular spike coincidences in visual detection tasks

   • Roman Bauer
   • Sabine Heinze

   Short Communication Pages: 316 - 318

9. Plant development in the absence of epiphytic microorganisms

   • U. Kutschera
   • V. Koopmann
   • R. Grotha

   Short Communication Pages: 319 - 321

10. Foraging reactivation in the honeybee Apis mellifera L.: factors affecting the return to known nectar sources

    • Mariana Gil
    • Walter Farina

    Short Communication Pages: 322 - 325

11. Small hive beetles survive in honeybee prisons by behavioural mimicry

    • J. Ellis
    • C. Pirk
    • P. Elzen

    Short Communication Pages: 326 - 328