The characteristics of all main groups of soil-bound insects are given in this book. <p>NOTE FROM THE EDITOR ON NOMENCLATURE AND TAXONOMY INTRODUCTION, LIST OF GENERA DESCRIBED IN THIS MONOGRAPHY 1 OUTLINE OF THE BIOLOGY 2 OUTLINE OF THE MORPHOLOGY 3 COLLECTING, PRESERVING, AND STUDYING THE MATERIAL 4 SYSTEMATIC OUTLINE OF THE GALL MIDGE LARVAE APPENDIX: DESCRIPTIONS OF THE NEW SPECIES OF GALL MIDGES MENTIONED IN THIS MONOGRAPHY</p>