COXT F.NTS. 
Page. 
Introduction 13 
Previous work in the practical handling of natural enemies of injurious insects. . 1G 
Early practical work 17 
Permitting the parasites to escape 18 
The transportation of peraflitefl from one part of a iriven country to another 
part 20 
The transfer of beneficial insects from one country to another 23 
Early attempts 23 
The Australian ladybird (Aom/s airdhmlis Muls.) in the United 
States 24 
Novius in Portugal 27 
Icerya in Florida 28 
Novius in Cape Colony 28 
Novius in Egypt and the Hawaiian Island.- 28 
T ?erya in Italy 29 
Icerya in Syria 29 
The reasons fur the success of Novius •. . . 29 
Introduction of Entafon < ptyoni/s W alk, into the United States 30 
Other introductions by Kocbele into California 31 
[nteroatkmal work with enemies of the Mack scale 31 
The Hawaiian work 34 
An importation of Clerufl from Germany 36 
MarlatCs journe\ for enemies of the San Jose scale 36 
The parasites of pia.spi.s /» nlatjona Targ - 38 
The work of Mr. (iconic Compere 38 
Work with the egg parasite of the elm leaf hectic 39 
Work with parasites of ticks 41 
Mr. Froggatt's journey to various parts of the world in 1!»07-S 42 
Other work of this kind (by Iierlese; by Silvestri; in Algeria; in the 
Philippines; by De Buasy; in Peru) 44 
Early ideas on introducing the natural enemies of the gipsy moth 47 
Circumstances which brought about the actual beginning of the work 49 
An investigation ol the introduction work 50 
Namtive of the progress of the work 54 
Known and recorded parasites of the gipsy moth and of the brown-tail moth. . . 84 
Establishment and dispersion of the newly introduced parasites 94 
Disease as a factor in the natural control of the gipsy moth and the brown-tail 
moth 97 
Studies in the parasitism of native insects 102 
Parasitism as a factor in insect control 105 
The rate ol increase of the. gipsy moth in New England 109 
Amount of additional control necessary to check the increase ol the gipsy moth 
. in America 114 
The extent to which the gipsy moth is controlled through parasitism abroad 117 
Parasitism of the gipsy moth in Japan 120 
Parasitism ol the gipsy moth in Russia 123 
Parasitism of the gipsy moth in southern France 129 
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