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one and probably held them better, as they could not as readily fiy out 
after having entered. It was found that more insects were captured 
when the net was pushed ata ran that when walking. Probably even 
then mazy insects succeeded in flying out of the forward net. 
Nets arranged in this manner, two or even three in succession, might 
be made eight or ten feet long and run by boys, one at each end. The 
forward net should be closed as soon asa stop is made, and the nets all 
closed at the finish, when they may be left a day or two for the insects 
to die. Usually there are enough predaceous species captured to kill 
the others rapidly, and such species could then be set free. Many 
species of insects beside the Leaf-hoppers are caught by this device, and 
some, such as the moths of Turf Web- worms, and Cut-worms, smail Dip- 
tera, Clover-seed Midges, etc., that are not as apt to be taken in the hop- 
per dozer. 
Hopper Dozer.—This simple contrivance (a sheet-iron pan containing 
kerosene and water or coal tar, to be dragged over the infested ground), 
devised for the destruction of the Rocky Mountain Locust, possesses the 
essential qualities for the destruction of the Leaf hoppers as well. I 
believe that it can be used with profit in any pasture affected with these 
pests. The delicate Leaf-hoppers are killed by the kerosene almost the 
instant they touch it, and though my trials with it were made when the 
weather was so cool that the hoppers did not leap with their usual ac- 
tivity, they showed that it would operate successfully. It would be 
best, probably, to use it for these during warm days, when the insects 
are at their greatest activity, and early enough in the spring to catch 
the hibernating adults before they deposit eggs, repeating the opera- 
tion, if necessary, in July, and for meadows immediately after the re- 
moval of the hay crop. Perhaps two pans, one behind the other, will 
prove advantageous. 
The Shield Method.—A plan that is scarcely more than a modification 
of the above has been recently highly recommended for the destruction 
of the Leaf-hoppers infesting grapes. A quite similar plan was adopted 
fer the destruction of the Rocky Mountain Locust years ago and is 
described in the first report of the United States Ent. Com.; and in his 
first annual report as State Entomologist of New York, Professor Lint- 
ner suggests its use for ‘“‘low-feeding insects” ‘especially hopping 
species.” I have not as yet tested it myself, but will give the plan, that 
others may test it for these insects if disposed. A piece of drilling or, 
what would be cheaper still, a strip of building paper is fastened to a 
light wooden frame and is coated with coal-tar or gas-tar, the residue 
from distilling off kerosene from petroleum, or from gas manufacture. 
In case of grape Leat-hoppers this frame is held as near the vines as pos- 
sible by one man, while another lifts the branches. The hoppers darting 
against the shield are caught and killed. For grass Leaf-hoppers the 
frame would be set on runners and could be made 10 to 15 feet 
long and run by a boy or man at eachend. The best angle at which to 
