CONTENTS 



PAGE 



PREFACE v 



LIST OF ILLUSTRATIONS ix 



DIPTERA. By D. W. Coquillett I 



TENTHREDINOIDEA. By Trevor Kincaid 79 



SPHEGOIDEA AND VESPOIDEA. By Trevor Kincaid 107 



FORMICID^E. By Theo. Pergande 113 



HYMENOPTERA. By William H. Ashmead 119 



INDEX 275 



(vii) 



