CONTENTS 



PAGE 



Introduction 5 



History 6 



Dispersion 6 



Distribution 6 



Systematic position 7 



Economic importance 7 



Hosts 8 



Methods of study 8 



Life history 9 



The egg 9 



Incubation period 10 



The larva 11 



Description 11 



Feeding habits- 11 



Length of period 13 



Description 14 



Pupation ' 14 



Construction of cocoon v 15 



The pupa 16 



Transformation 16 



Description 17 



Duration of pupal stage v 17, 



Adults 18 



Description 18 



JBmergence 19 



Duration of life 19 



Proportion of sex 19 



Habits 21 



Period between emergence and copulation 31 



Life of unmated females 32 



Mating 22 



Age %t beginning of oviposition 22 



Process of oviposition 2.3 



Time of ovipositi,on 24 



Habits during oviposition 24: 



Period of oviposition 24 



