1. Ontogeny of sexually dimorphic distance calls in bengalese finches (Lonchura domestica)

   • Tomoko Yoneda
   • Kazuo Okanoya

   OriginalPaper Pages: 41 - 46

2. Effects of spermatophore size on female remating in the armyworm,Pseudaletia separata, with reference to larval crowding

   • Yibin He
   • Yoshitaka Tsubaki

   OriginalPaper Pages: 47 - 50

3. Gall cleaning by the aphidHormaphis betulae

   • Utako Kurosu
   • Shigeyuki Aoki

   OriginalPaper Pages: 51 - 55

4. The possibility of sex and nymph discrimination by the male cockroach,Nauphoeta cinerea

   • Masao Fukui
   • Shozo Takahashi

   OriginalPaper Pages: 57 - 66

5. Shell fights in the hermit crabPagurus geminus: Aggressive act with mutual gain

   • Michio Imafuku

   OriginalPaper Pages: 67 - 76

6. Predatory behavior of the praying mantis,Tenodera aridifolia II. Combined effect of prey size and predator size on the prey recognition

   • Taku Iwasaki

   OriginalPaper Pages: 77 - 81

7. Maternal behaviour in sows of different social rank

   • Davide Csermely
   • Elena Nicosia

   OriginalPaper Pages: 83 - 93

8. Male territoriality and mating tactics in the wool-carder bee,Anthidium septemspinosum Lepeletier (Hymenoptera: Megachilidae)

   • Naoto Sugiura

   OriginalPaper Pages: 95 - 103

9. Diel activity of breeding individuals of a freshwater amphipodJesogammarus spinopalpus

   • Harumi Kusano
   • Tamotsu Kusano

   OriginalPaper Pages: 105 - 111

10. Host acceptance behavior of the Japanese aquatic wasp,Agriotypus gracilis (Hymenoptera: Ichneumonidae) toward the caddisfly host,Goera japonica (Trichoptera: Limnephilidae)

    • Masato Aoyagi
    • Minoru Ishii

    OriginalPaper Pages: 113 - 119

11. Comparison of intraspecific nest usurpation between two haplometrotic paper wasp species (Hymenoptera: Vespidae:Polistes)

    • Shun'ichi Makino
    • Katsuhiko Sayama

    OriginalPaper Pages: 121 - 128

12. Temporal behavioral variation and division of labor among workers in the primitively eusocial wasp,Polistes jadwigae Dalla Torre

    • Koji Tsuchida

    OriginalPaper Pages: 129 - 134

13. Worker reproduction and related behavior in orphan colonies of a Japanese paper wasp,Polistes jadwigae (Hymenoptera, Vespidae)

    • Shinya Miyano

    OriginalPaper Pages: 135 - 146

14. Physical distortion of a call of the jungle crow (Corvus macrorhynchos) in the process of propagation

    • Kinya Nishimura
    • Kazuo Nakamura
    • Hideo Uzuki

    Short Communication Pages: 147 - 148