1. Optimal search direction for an animal flying or swimming in a wind or current

   • David B. Dusenbery

   OriginalPaper Pages: 2511 - 2519

2. Quinolizidine alkaloids obtained byPedicularis semibarbata (Scrophulariaceae) fromLupinus fulcratus (Leguminosae) fail to influence the specialist herbivoreEuphydryas editha (Lepidoptera)

   • Frank R. Stermitz
   • Gilbert N. Belofsky
   • Michael C. Singer

   OriginalPaper Pages: 2521 - 2530

3. Conspecific scent trailing by garter snakes (Thamnophis sirtalis) during autumn Further evidence for use of pheromones in den location

   • Jon P. Costanzo

   OriginalPaper Pages: 2531 - 2538

4. Empirical correlations between electroantennograms and bioassays forPeriplaneta americana

   • M. L. Contreras
   • D. Perez
   • R. Rozas

   OriginalPaper Pages: 2539 - 2548

5. Ecological adaptation of an Aristolochiaceae-feeding swallowtail butterfly,Atrophaneura alcinous, to aristolochic acids

   • Ritsuo Nishida
   • Hiroshi Fukami

   OriginalPaper Pages: 2549 - 2563

6. Oviposition stimulants of an Aristolochiaceae-feeding swallowtail butterfly,Atrophaneura alcinous

   • Ritsuo Nishida
   • Hiroshi Fukami

   OriginalPaper Pages: 2565 - 2575

7. (S)-2-pentadecyl acetate and 2-pentadecanone Components of aggregation pheromone ofDrosophila busckii

   • Angela M. Schaner
   • Liane D. Tanico-Hogan
   • Larry L. Jackson

   OriginalPaper Pages: 2577 - 2588

8. Chemistry of mandibular and Dufour's gland secretions of ants in genusMyrmecocystus

   • H. A. Lloyd
   • M. S. Blum
   • S. L. Evans

   OriginalPaper Pages: 2589 - 2599

9. Book review

   • Michael M. Martin

   BookReview Pages: 2601 - 2603

10. Announcements

    Announcement Pages: 2605 - 2605