1. The two reindeer parasites,Hypoderma tarandi andCephenemyia trompe (Oestridae), have evolved similar olfactory receptor abilities to volatiles from their common host

   • Bjørn Å. Tømmerås
   • Arne C. Nilssen
   • Atle Wibe

   Research papers Pages: 1 - 7

2. Oily substances from gastral intersegmental glands of the antPachycondyla tridenta (Ponerinae): Lack of pheromone function in tandem running and antibiotic effects but further evidence for lubricative function

   • Athlua B. Attygalle
   • Karla Jessen
   • Ulrich Maschwitz

   Research papers Pages: 8 - 12

3. Sex pheromones and attractants in the Eucosmini and Grapholitini (Lepidoptera, Tortricidae)

   • Peter Witzgall
   • Jean-Pierre Chambon
   • Jan Löfqvist

   Research papers Pages: 13 - 23

4. The use of the tergal gland defensive secretion in male intrasexual aggression of the rove beetle,Aleochara curtula (Coleoptera: Staphylinidae), measured by closed-loop-stripping-analyses and tandem bioassay — mass fragmentography

   • Klaus Peschke
   • Peter Friedrich
   • Manfred Metzler

   Research papers Pages: 24 - 33

5. Leaf volatiles and polyphenols in pear trees infested byPsylla pyricola. Evidence of simultaneously induced responses

   • P. Scutareanu
   • B. Drukker
   • M. W. Sabelis

   Research papers Pages: 34 - 38

6. Indirect evidence indicates female semiochemicals release male precopulatory behaviour in the snow crab,Chionoecetes opilio (Brachyura: Majidae)

   • Sylvie Bouchard
   • Bernard Sainte-Marie
   • Jeremy N. McNeil

   Research papers Pages: 39 - 44

7. Population-level variation in plant secondary chemistry, and the population biology of herbivores

   • Mark D. Hunter
   • Stephen B. Malcolm
   • Susan E. Hartley

   Commentary Pages: 45 - 56

8. (S)-2-Methyl-1-hexanol, characteristic mandibular gland substance of ants of theCataglyphis bicolor group

   • D. Agosti
   • C. Austin
   • R. Wehner

   Short communication Pages: 57 - 60