TABLE OF CONTENTS. IX 



Subfamily Psyllinae — Continued. Page. 

 Tribe Psyllini — Continued. 

 Genua Psylla — Continued. 



striata 150 



carpiuicola 151 



cephalica 151 



annulata 152 



negundinis 152 



brevistigmata 153 



magna 154 



acuta 154 



floccosa 154 



astigmata 155 



trimaculata 155 



cerasi 156 



alni americana 156 



caudata 157 



galeaformis 157 



torrida 158 



orizabensis 159 



minuticona 159 



recticeps provancher 159 



Diraphia quadricornis 160 



eauguinea 160 



Psylla duvause 160 



Bibliogi-aphy 161 



Explanation of plates 171 



Index 183 



