CONTENTS. 
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Previous work in the practical ieee of ote enemies aor injurious insects. 
OUR EE Ce) SUS “eas SSR 2; Sia ey SOE en eee ae gee 
Pease ie Arann 10 CHCAPE S68 ee Dt es kee bb en See 
The transportation of parasites from one part of a given country to another 
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The transfer of beneficial insects from one country to another.....-....---- 
CG Te 1 >, ni i ae ae 
The Austrahan ladybird (Noweis Seas Siete} in ies "eked 
iceemmatt torte. seo Se oe oe Pees” - o3 2 eee 
eras Wi OR os oe yo Ce SE zc epee ent eee eS SP 
Dipetig ites es COGN ie as Se a ot Sele A. eee 
Novius in Egypt and-the Hawaiian Tatrigds: ee nee meet eet Se oe 
Rpm NE TRIE CPO R ac ae oe eS ey Ske Wo. SE So wos ee ee 
a aa 1S A a pee oS dy < |S ae ee 
Puetesecntior Locnuccers Of Novis.) 2.2525. 2. = -- a5 2 - - eee we 
Introduction of Entedon ep:gonus Walk. into the United States... .-_-.- 
Other introductions by Koebele into California...............-.-..---- 
International work with enemies of the black scale. ................-- 
pie ee Cc AN PRIMER eg ee fers Lo eds Sec ee 
An importation of Clerus from Germany..-.-......-..---------- 
-Marlatt’s journey for enemies of the San Jose one Ee oe Sn. Se 
The parasites of Diaspis pentagona Targ...........-..---------.------- 
a rnrOineet tate Comper. So koe oe te oe ee we spe Gee 
Work with the egg parasite of the elm leaf-beetle...................-- 
Work with parasites of ticks. ...........-..-- vor = 
Mr. Froggatt’s journey to various parts of the world i in 1907 8... ators hates 
Other work of this kind (by Berlese; by Silvestri; in Algeria; in the 
Peres. Dy De Lune tn Pere) 2055082. 3... eee gee eS 5ey 
Early ideas on introducing the natural enemies of the gipsy moth.............-- 
Circumstances which brought about the actual beginning of the work... ..-..--- 
An mvestigation of the introduction work. .-......../..:......-..-.---..------ 
Peaster Gr Sue pr0erems te tan WORK 2, 7-4 2 -. s+ ak hn ee - 5 = swe eww 
Known and recorded parasites of the gipsy moth and of the brown-tail moth... 
Establishment and dispersion of the newly introduced parasites.............-- 
Disease as a factor in the natural control of the gipsy moth and the brown-tail 
Baudionin the paracitism of native Insects. ............2.......-.-.-..-..--..-- 
Parasitism as a factor in insect control...........-..- eee 
The rate of increase of the gipsy moth in ‘Hew England. pee ar ee darn swiss 
Amount of additional control necessary to check the increase of the gipsy moth 
The extent to which the gipsy moth is controlled through parasitism abroad. . - - 
eens tie Prey MGth 1 Japan. ........ .-...2.--.-~..--.-5- 2+ 65. 
Parasitism of the gipsy moth in Russia. . a Oe ee ae ee ee 
Parasitism of the gipsy moth in southersi Wries.t-c-.=---.-- RENAE Fo Ot 
