CONTENTS 



Page. 



Introduction 33 



Tlie boet leaf hopper ( Euteltix tenella Baker) 35 



Descriptive 35 



The adult 35 



The eggs 35 



The nymphs 35 



Food plants 35 



Distribution 36 



Life history studies 36 



Record at Lehi, Utah 36 



Record at Monroe, Utah 38 



Other records in Utah 38 



Cage experiments, Lehi, Utah 38 



Summary of life history 40 



Economic relations 41 



Characteristics of "curly-leaf " 44 



Other records 46 



Economic summary and proposed remedies 47 



Bibliographical references 48 



Other leafhoppers 49 



Eutettiv strobi Fitch 49 



Eutettix scitula Ball - 49 



Eutettix serninuda Say 50 



Eutettix darivida Van Duzee 50 



Eutettix insana Ball, E. albida Ball, and E. pauperculata Ball 50 



Eutettix stricta Bal 1 50 



Agallia sanguinoletda Prov 51 



Agaliia cinerea Osborn and Ball 51 



Agallia higelovix Baker 51 



Agallia quadripundula Prov. and A. novella Say 51 



Empoaaca sp 51 



Conclusions in regard to "curly-leaf" 52 



66-— IV 



m 



