CONTENTS. 
Page. 
Introduction 9 
The citrus white fly 9 
General 9 
Description 10 
Distribution in the United States 11 
Injury 11 
Methods of control and their efficiency 12 
Conditions leading to demand for a search for natural enemies of the citrus white 
fly 13 
Preparations for the search 14 
Investigations in Europe 15 
Investigations in Ceylon 16 
Investigations in India 17 
General 17 
The botanical gardens ' 18 
Discovery of the citrus white fly at Saharanpur 19 
Discovery of Cryptognatha flavescens, the lady-beetle enemy of the citrus 
white fly 19 
Discovery of the brown fungus, Mgerita webberi 20 
Searching at Lahore 20 
Discovery of Prospaltella lahorensis, the true internal parasite of the citrus 
white fly 21 
Conclusions drawn from situation at Saharanpur and Lahore 22 
Aleyrodes citri in India 22 
Investigations in Burma, Java, southern China, and the Philippine Islands ... 23 
Further investigations in India 25 
Concentration of efforts at Lahore 25 
Discovery of living parasites 26 
Considerations in collecting and transporting Prospaltella lahorensis 27 
Destruction of young growth of citrus trees by insect pests 27 
Notes on the life history of Aleyrodes citri in northern India 28 
Number of broods of the citrus white fly 29 
The effects of temperature on white-fly development 29 
The effect of humidity on white-fly development 31 
Prospaltella lahorensis, the true internal parasite 34 
Infesting young orange trees with Aleyrodes citri 34 
Cases used in transporting parasites 35 
Cryptognatha flavescens, the predatory enemy of the citrus white fly 36 
Preparation of beneficial insects for shipment 37 
Transporting the natural enemies of the citrus white fly from India to the 
United States 37 
Condition of natural enemies on arrival at Orlando, Fla 38 
Conditions at Orlando, Fla., when the natural enemies arrived 38 
Loss of the natural enemies 38 
The possible efficiency of these natural enemies if established in Florida 39 
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