1. Search behavior of pheromone-stimulated potato tuber moth males (Lepidoptera: Gelechiidae)

   • Tomohiro Ono

   OriginalPaper Pages: 1 - 4

2. Operant conditioning of small birds for acoustic discrimination

   • Thomas Park
   • Kazuo Okanoya
   • Robert Dooling

   OriginalPaper Pages: 5 - 9

3. Male altruism and wing polymorphism in a parasitic wasp

   • Utako Kurosu

   OriginalPaper Pages: 11 - 19

4. Social behaviour of an Australian paper wasp,Ropalidia plebeiana, with special reference to the process of acceptance of an alien female

   • Yosiaki Itô

   OriginalPaper Pages: 21 - 25

5. Social relations among females in pre- and postemergence colonies of a subtropical paper wasp,Parapolybia varia (Hymenoptera: Vespidae)

   • Sôichi Yamane

   OriginalPaper Pages: 27 - 38

6. Feral cattle (Bos taurus) on Kuchinoshima Island, southwestern Japan: Their stable ranging and unstable grouping

   • Daiji Kimura
   • Hiroshi Ihobe

   OriginalPaper Pages: 39 - 47

7. Field observations on the rhythmic up-and-down movement ofNodilittorina exigua (Gastropoda: Littorinidae)

   • Shun-ichi Ohgaki

   OriginalPaper Pages: 49 - 58

8. Sex pheromones in maleMelittobia parasitic wasps: Female response to conspecific and congeneric males of 3 species

   • Robert W. Matthews
   • Junichi Yukawa
   • Jorge M. Gonzalez

   OriginalPaper Pages: 59 - 62

9. The outcome of the trade-off relation between number and viability of the offspring from the viewpoint of evolutionary stability

   • Masayuki Kakehashi

   OriginalPaper Pages: 63 - 71

10. Why do male sika deer wallow during the rut?

    • Shingo Miura

    Short Communications Pages: 73 - 75

11. Unique foraging behavior ofDotillopsis brevitarsis (Crustacea Brachyura: Ocypodidae)

    • Keiji Wada

    Short Communications Pages: 76 - 78

12. Why does the ability to distinguish the mating partner of the same species in the wolf spider differ between the male and the female?

    • Masayoshi Suwa

    Short Communications Pages: 79 - 82