THE PAEASITES OF POPILLIA JAPONICA 6 
In July of 1923 a scouting trip was undertaken through the central 
portions "of Manchuria, extending from Antung on the Chosen border 
to Harbin in the north. The greater part of this area is very flat 
and almost entirely devoid of trees and shrubs. Only two species of 
Popilha (P. castanoptera Hope and P. mutans Newm.) were found in 
Fig. 1.— Map of Japan and Chosen (Korea) showing the main areas in which Popillia japonica 
and its parasites were studied 
this section, and in such very small numbers as not to admit of para- 
site investigations. 
THE PARASITES AND THEIR BIOLOGY 
In the course of the investigations nine parasites of Popillia 
japonica and related species were found and their relations to the host 
species determined. In addition, one predator was studied in some 
