1. Toxicity of nonhost phototoxins to parsnip webworms(Lepidoptera: Oecophoridae)

   • May R. Berenbaum
   • Keywan Lee

   Research papers Pages: 81 - 85

2. Prey odor discrimination by ingestively naive coachwhip snakes(Masticophis flagellum)

   • William E. Cooper Jr.
   • Donald G. Buth
   • Laurie J. Vitt

   Research papers Pages: 86 - 91

3. Scent-rubbing and status signalling by male mammals

   • L. Morris Gosling
   • Helen V. McKay

   Research papers Pages: 92 - 95

4. Defensive secretions from the larvae ofApatania fimbriata (Pictet) (Trichoptera: Limnephilidae)

   • Rüdiger Wagner
   • Michael Aurich
   • Hans Jürgen Veith

   Research papers Pages: 96 - 104

5. Aggregation pheromone ofCarpophilus freemani (Coleoptera: Nitidulidae): A blend of conjugated triene and tetraene hydrocarbons

   • Robert J. Bartelt
   • Patrick F. Dowd
   • David Weisleder

   Research papers Pages: 105 - 113

6. Responses of three mouse species to deterrent chemicals in the monarch butterfly. I. Taste and toxicity tests using artificial diets laced with digitoxin or monocrotaline

   • John I. Glendinning
   • Lincoln P. Brower
   • Charles A. Montgomery

   Research papers Pages: 114 - 123

7. Responses of three mouse species to deterrent chemicals in the monarch butterfly. II. Taste tests using intact monarchs

   • John I. Glendinning

   Research papers Pages: 124 - 130

8. Secretion-grooming in aquatic beetles (Hydradephaga): A chemical protection against contamination of the hydrofuge respiratory region

   • Damir Kovac
   • Ulrich Maschwitz

   Research papers Pages: 131 - 138

9. Sensitivity to biologically relevant odours may exceed the sum of component thresholds

   • Matthias Laska
   • Robyn Hudson
   • Hans Distel

   Short Communication Pages: 139 - 141

10. Chemical screening programs in the real world

    • Timothy Johns

    Commentary Pages: 142 - 143

11. Erratum

    Erratum Pages: 143 - 143

12. Annoucements

    Announcement Pages: 144 - 144