UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 142S 
Washington, D. C. ▼ January, 1927 
THE PARASITES OF POPILLIA JAPONICA IN JAPAN AND CHOSEN (KOREA), 
AND THEIR INTRODUCTION INTO THE UNITED STATES 
By Curtis P. Clausen and J. L. Kixg, Entomologists, Japanese Beetle Investi- 
gations, Bureau of Entomology, and Cho Teraxishi, Assistant l 
CONTENTS 
Pag8 Page 
The general problem 1 Life history of Popillia japonica in Japan 44 
The field of investigation 2 Food plants of Popillia in Japan 47 
The parasites and their biology 3 Chmatic conditions in the main fields of in- 
Centeter cinerea AJdrich.. _ 4 vestigaticn 48 
Ochromeigenia ormioides Townsend 17 Agriculture and natural lands of Japan and 
Eutrixopsis javana Townsend --- 19 Chosen in relation to Popillia ._ 51 
Proserin stherita Fabricius 20 The species of Popillia in Chosen 53 
Dexia ventralis AJdrich 26 Popillia atrocoeruha Bates 53 
Campsomeris annulata Fafcrieius .. 31 Popillia castanoptera Hope 53 
Tiphia popilliavora Eohwer 33 Popillia mutans Xewm __ 54 
Tiphia ver nalis Eohwer 40 Summary 54 
Tiphia koreana Eohwer 42 
Craspedonotus tibialis Schaum 43 
THE GENERAL PROBLEM 
The foreign work 2 in regard to the natural enemies of the so- 
called Japanese beetle (Popillia japonica Xewm.) represents one 
phase of the general problem dealing with the control of this rapidly 
increasing insect. The work in Japan was initiated in the early 
spring of 1920, with headquarters at Yokohama, and investigations 
have been in progress continuously since that time, being confined 
for the first two years to Japan and extended in 1922 to Chosen. 
It is expected that importations of the various parasites found will 
be continued until establishment is certain, or it is demonstrated 
that environmental and other factors do not permit of its accom- 
phshment . 
i Valuable assistance was rendered in this work by Xaku Sato, who has been engaged on the project for 
the last three years. Yoshiro Ouchi also joined the force in 1923. 
2 During the writers' sojourn in Japan they were most courteously received and aided by all the Japanese 
Government departments, particularly by the department of agriculture and commerce. Special apprecia- 
tion is felt for the great help rendered in many ways by S. I. Kuwana, director of the imperial plant quaran- 
tine station, and his staff. Thanks are also due to S. Matsumura, professor of entomology at the Hokkaido 
Imperial University, for the use of the university collections; to H. Okamoto, entomologist of the Govern- 
ment general agricultural experiment station at Suigen, Chosen; to S. Kuwayama, entomologist of the 
Hokkaido Agricultural Experiment Station; and to the directors of the two last named stations, where 
laboratory facilities were kindly provided during the course of the field work. 
To Baron Iwasaki and the directors of his estate at Koiwai grateful acknowledgements are made for 
working quarters during three seasons and for privileges which permitted an extended investigation of the 
most important area, from the point of view of Popillia parasites, thus far found in Japan. 
Determination of species and descriptions of those which proved to be new have been made by J. M. 
AJdrich of the United States X~ational Museum and S. A. Eohwer of the Bureau of Entomology, the 
former dealing with the Diptera and the latter with the Hymenoptera. 
98689—27 1 1 
