190 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
it and sending to this country such parasites as may be practical. 
Although the Japanese entomologists know nothing about the para¬ 
sites of Popillia in Japan, we know that white grubs, so called, all have 
their insect parasites and it is reasonable to assume that Popillia is 
not an exception, and that effective parasites, probably digger wasp 
parasites of the grub, will be found. We already have one good exam¬ 
ple of white grub control by an introduced parasite, namely Anomola 
orientalis, which is reported to be well under control in Hawaii fol¬ 
lowing the successful introduction of a digger wasp ( Scolia manilce) 
from the Philippines. Incidentally it might be mentioned that through 
the cooperation of Mr. Otto Swezey we received from Hawaii this past 
fall living Scolia manilce adults and while these wasps paralyzed the 
grubs of Popillia they did not oviposit thereon. 
In addition to insect enemies from the home of the Japanese beetle, 
it is planned to establish a large colony of English pheasants, which we 
know to be very fond of this beetle. 
2. To Prevent Spread is of paramount importance and we hope to 
accomplish this by quarantine, educational measures, roadside clean¬ 
up, barrier band and the reduction of the insects in the heaviest in¬ 
fested areas. 
(a) Quarantine. Since it was known that the beetles frequented 
corn fields and concealed themselves beneath the husks of corn, thus 
affording easy means of carriage to outlying districts without being 
noticed, a quarantine covering green corn was effectively enforced in 
1919. The quarantine was fully justified and observations illustrate 
the importance of a stricter quarantine next season. A quarantine 
requiring a strict certification of all foodstuffs and other products 
likely to carry the beetle is anticipated. The quarantine service will 
be fully treated in a paper by Mr. Hadley who had charge of this phase 
of the work the past season. 
(b) Educational Measures. By educational measures, meetings, 
neighborhood discussions and personal contact it is planned to famil¬ 
iarize the residents of the infested area and that surrounding with the 
insect and to secure their cooperation in taking every precaution when 
traveling out of the infested territory and especially to discourage the 
carrying out of flowers and plants during the beetle flight and plants 
with soil at all times. Circular letters containing information on the 
work, our progress and plans and timely cooperative suggestions are 
mailed to the residents of the infested and surrounding territory about 
once a month and these together with the meetings have done much to 
secure the needed cooperation. 
(c) Roadside Clean-up. To minimize the chances of beetles entering 
vehicles and thus being carried out, the roadsides throughout the beetle 
