Innehåll: Contributors 1. lntroduction to Cecidology / M. S. Mani -- 2. Diversity of Gall-lnducing lnsects and Their Galls / F. Dreger-Jaujfret and J. D. Shorthouse -- 3. Evolution of the Gall-lnducing Guild / J. C.Roskam -- 4. Fossil Galls / H. G. Larew -- 5. Patterns in Gall Development / 0. Rohfritsch -- 6. Developmental Morphology of Two Types of Hymenopterous Galls / L. A. Rey -- 7. Strategies in Gall lnduction by Two Groups of Homopterans / 0. Rohfritsch and M. Anthony -- 8. The Role of Nutritive Cells in the Nutrition of Cynipids and Cecidomyiids / R. Bronner -- 9. Cecidogenesis and Resistance Phenomena in Mite-lnduced Galls / E. Westphal -- 10. lnsect Secretions and Their Effect on Plant Growth, with Special Reference to Hemipterans / K. Hori -- 11. Biology of Dasineura affinis (Cecidomyiidae) and lnfluence of lts Gall on Viola odorata / M. L. Birch, J. W Brewer, and 0. Rohfritsch -- 12. Unique Aspects in the Biology of Thrips-lnduced Galls / T. N. Ananthakrishnan -- 13. Biology of Gall Midges on Common Reed in Czechoslovakia / M. Skuhrava and V Skuhravy -- 14. Evolution and Ecology of Gall-lnducing Sawflies / P. W Price -- 15. Ecology of Pemphigus Gall Aphids / T. G. Whitham -- 16. Ecological Relationships of lnsects lnhabiting Cynipid Galls / A. A. Wiebes-Rijks and J. D. Shorthouse -- 17. Effects of Urbanization on the Distribution and Abundance of the Cynipid Gall Wasp, Disholcaspis cinerosa, on Ornamental Live Oak in Texas, U.S.A. / G. W Frankie, D. L. Morgan, and E. E. Grissel