1. Assessment of aphid colonies by hoverflies. III Pea aphids andEpisyrphus balteatus (de Geer) (Diptera: Syrphidae)

   • Eiko Kan

   OriginalPaper Pages: 1 - 6

2. A new analysis method for the comparison of 2 temporal patterns, with indices of association

   • Hiromichi Hosoma

   OriginalPaper Pages: 7 - 16

3. A theory of gene-culture coevolution of parental preference and sex ratio in humans

   • Yasushi Harada

   OriginalPaper Pages: 17 - 25

4. Variations of foraging tactics in a water bug,Diplonychus indicus

   • Ann Cloarec

   OriginalPaper Pages: 27 - 34

5. Shell fights in the hermit crabPagurus geminus: Effect of cheliped use and shell rapping

   • Michio Imafuku

   OriginalPaper Pages: 35 - 39

6. The flexible grouping and behavioral character of a flock of Suffolk ewes (Ovis aries)

   • Kaori Kawai

   OriginalPaper Pages: 41 - 51

7. Brief field observations on the foraging behavior of the Japanese striped snakeelaphe quadrivirgata

   • Akira Mori

   Short Communications Pages: 53 - 56

8. Multiple-comb nest foundation by a single inseminated worker of the temperate paper wasp,Polistes snelleni Saussure (Hymenoptera: Vespidae)

   • Masato Ono

   Short Communications Pages: 57 - 58

9. Male approach to pupae in the yellow butterfly,Eurema hecabe

   • Yoshiomi Kato
   • Tatsuo Nakane

   Short Communications Pages: 59 - 61

10. Switching of behavioral option from renesting to nest usurpation after nest loss by the foundress of a paper wasp,Polistes riparius: A field test

    • Shun'ichi Makino

    Short Communications Pages: 62 - 64