TABLE OF CONTENTS. 



page: 



Introduction • 121 



External Anatomy of Tachytes distinctus 125 



Systematic Larrid^ 137 



Key to the family. . ■ 137 



Key to the genera 139 



Larra 1 40 



Notogonia 141 



Larropsis 141 



Tachytes . 149 



Tachysphex ! 58 



Lyroda 174 



Plenocidus 174 



Niteliopsis 1 76 



Miscophus 179 



Bothynostethus 119 



Recapitulation and comment 180 



Notes on the Biology of the Larrid.e 183 



Introduction 183 



Specific biology 183 



Summary 210 



Table of the prey of the Larridas 2H 



Bibliography 211 



Explanation op Plates. 



(119) 



