53 
In lawns, strawberry plots, and similar cultures, they may be 
dlled by soaking* the ground in which they make their presence 
manifest with a kerosene emulsion diluted to contain six to 
ceil per cent, kerosene. 
The beetles may be destroyed by throwing a spray of Paris 
rreen (about a pound to two hundred and fifty gallons of 
yater) upon the trees they most infest,—most frequently ash, 
Dak, and maple, but varying according to the species of beetle 
abroad and the kind of trees within their reach. 
In case the white grubs become in any neighborhood so com¬ 
monly and seriously destructive as to require this method of 
attack upon the beetles, it is important that measures should 
be taken as early in spring as the adults begin to fly. 
It is quite possible that in time the ravages of these and 
other earth-feeding insects will combine with various more 
strictly agricultural conditions to bring in the practice of a 
clean summer fallow as a part of the regular farm routine in 
Illinois. Certainly by this practice the grubs in any piece of 
earth may be destroyed, except such as are so far advanced in 
their development as to be able to complete their transforma¬ 
tions while feeding only on rich earth. A certain per cent, of 
those full grown in spring might possibly reach this end with¬ 
out vegetable food. 
Although a part of our white grubs, belonging to one abund¬ 
ant species, Cyclocephala immaculata ., have a life history some¬ 
what different from that given above, this fact does not ma¬ 
terially affect remedial or preventive measures; and the sug¬ 
gestions here made apply to all larvae affecting grass or grain 
at all likelv to be commonlv called white grubs. 
