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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
tance in this manner, especially along the smaller streams flowing 
through the infested territories. 
Dispersion by Artificial Agencies. Undoubtedly artificial agen¬ 
cies have played an important part in the local dispersion of the 
insect. For example, during the inspection of sugar corn, prior to the 
corn being carried to the market, many thousands of beetles have been 
removed from the ears of corn. Very often beetles have been found in 
the husks of the ear, in positions such as to practically insure their 
carriage, at least to the market where the corn is deposited, unless they 
have been removed by hand. Beetles have also been found in baskets 
and other containers in which produce is shipped from the infested area 
to the market. 
Passing vehicles also afford a means of artificial dispersion of the 
insect, but probably not over as great distances as by the means men¬ 
tioned in the preceding paragraph. There are many records of findings 
of beetles on vehicles of all descriptions passing through the infested 
territory. This fact has also been proven experimentally, as follows: 
a truck was covered with coarse mesh screen wire, which was smeared 
over with tanglefoot, and along the sides of which was fastened a trough, 
also smeared with tanglefoot. During the summer of 1921 this truck 
was driven over a part of the roads through both the heavily and lightly 
infested areas; many beetles were caught by the tangle foot on the wire 
and along the trough, indicating clearly that many beetles would have 
fallen in the truck had it not been covered by the wire. 
The movement of humans on foot in and through heavily infested 
fields may also result in the artificial dispersion of the insect locally. 
For example, beetles have been removed from the clothing of men 
working in infested orchards after they have left the orchard; beetles 
have also been removed from the clothing of pedestrians walking along 
the roads and paths, or through fields, in the heavily infested districts. 
Artificial dispersion over long distances is most apt to result from the 
shipment of infested nursery stock. All evidence at hand seems to 
show beyond reasonable doubt that the original infestation in this 
country resulted from the importation of stock from Japan, namely 
iris or azalea, with the soil about the roots, infested with the larval stage 
of the insect. Several similar cases have come to the attention of the 
writers, where imported stock of this character has been found, upon 
examination, to carry living larvae of Anomala or other related groups. 
Experience with nurseries located in the beetle infested area has shown 
that stock commonly shipped with soil around the roots, such as potted 
