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TABLE OF CONTENTS. 



INTRODUCTION 5 



^ ACKNOWLEDGMENTS . , 8 

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v ECONOMIC IMPORTANCE OF THE CICADELLID^E ". 10 



,x LIFE HISTORY 22 



' NATURAL ENEMIES 26 



GEOGRAPHICAL DISTRIBUTION 30 



SYSTEMATIC POSITION OF THE CICADELLID;E 33 



THE CHIEF MORPHOLOGICAL FEATURES 40 



ATHE MALE GENITALIA 44 



RECOGNITION OF THE CICADELLID^ 53 



YSTEMATIC TREATMENT OF THE KANSAS SPECIES 54 



297 



289754 



