1. Defensive anointing: extended chemical phenotype and unorthodox ecology

   • Paul J. Weldon

   Opinion Pages: 1 - 4

2. Mimicry: imitative depiction of discharged defensive secretion on carapace of an opilionid

   • Andrés González
   • Carmen Rossini
   • Thomas Eisner

   Research paper Pages: 5 - 7

3. Food influence on colonial recognition and chemical signature between nestmates in the fungus-growing ant Acromyrmex subterraneus subterraneus

   • Freddie-Jeanne Richard
   • Abraham Hefetz
   • Christine Errard

   Research paper Pages: 9 - 16

4. Time course of pyrrolizidine alkaloid sequestration in Longitarsus flea beetles (Coleoptera, Chrysomelidae)

   • Ingo Narberhaus
   • Claudine Theuring
   • Susanne Dobler

   Research paper Pages: 17 - 23

5. Immunoregulatory activity of different dietary carotenoids in male zebra finches

   • Kevin J. McGraw
   • Daniel R. Ardia

   Research paper Pages: 25 - 29

6. Ranking of individual mountain birch trees in terms of leaf chemistry: seasonal and annual variation

   • Marianna Riipi
   • Erkki Haukioja
   • Kalevi Pihlaja

   Research paper Pages: 31 - 43

7. Main nutrient compounds in food bodies of Mexican Acacia ant-plants

   • Martin Heil
   • Birgit Baumann
   • K. Eduard Linsenmair

   Research paper Pages: 45 - 52

8. Identification of polyenic hydrocarbons from the northern winter moth, Operophtera fagata, and development of a species specific lure for pheromone traps

   • Gábor Szőcs
   • Miklós Tóth
   • Wittko Francke

   Research paper Pages: 53 - 58