CONTENTS. 



Page. 



Introduction 43 



History 43 



Recent records 44 



Nature and extent of injuries 44 



Origin and distribution 45 



Description 46 



The adult 46 



The egg 47 



The larva, first stage 47 



The larva, second stage 47 



The young nymph or prepupa 47 



The full-grown nymph or pupa 48 



Habits of the adult 48 



Habits of the larvae 49 



Habits of the prepupa and pupa 50 



Food plants 51 



Life history 51 



Life cycle 51 



Longevity 51 



Generations 52 



Natural control 52 



Rain 52 



Natural enemies 52 



Artificial control ■ 52 



Experiments with remedies 52 



Fumigation experiments 52 



Spraying experiments 56 



Summary of experiments 57 



Remedies recommended 57 



Bibliography 58 



ILLUSTRATIONS. 



rage. 

 Fig. 15. Greenhouse thrips (Heliothrips haemorrhoidalis): Adult female and 



antenna 46 



16. Greenhouse thrips: Egg, first-stage larva, full-grown larva 47 



17. Greenhouse thrips: Prepupa, pupa 48 



II 



