188 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 11 
After twenty-four hours 603 dead chinch-bugs were counted in a space 
two inches square on and beside this wick. This remained effective 
as long as the wick was kept moist and the weather continued dry. 
Rains had the effect of greatly lessening the number of bugs killed. 
A device sold generally for poisoning flies, known as “The Daisy 
Fly-killer,” and containing “metallic arsenic/’ according to the label, 
was placed on the ground near the barrier and lightly covered with 
straw. This apparatus consisted of a shallow tin box about three 
inches one way by two the other, with a number of perforations in the 
top through which insects could get access to the poison solution which 
it contained. It was kept in place for six days, and an average of 300 
dead chinch-bugs per day were found on and immediately around it. 
Attempts to make the solution of lead acetate more attractive to the 
chinch-bugs by adding the juice of freshly crushed corn stalks, were 
without results. Bran, corn silage, the very dry refuse corn stalks 
from the feed lot, wheat straw, and weeds, were all tried as carriers for 
the poison solutions. Only the corn silage and bran proved of any 
value, and these were not as attractive to the bugs as the freshly cut 
and dried corn stalks. 
Although these experiments have not been carried to a point where 
any of the facts learned from them can be applied in field practice in 
combating the chinch-bug, and possibly no such application can be 
made, they have at least shown that it is possible to kill chinch-bugs in 
large numbers by the use of soluble poisons, and may prove of value 
in our fight against this insect. 
Urbana, Illinois, 
December 18, 1917. 
Adjournment. 
Afternoon Session, Wednesday, January 2,1918,1.20 p. m. 
President R. A. Cooley: We will take up the next number on 
the program, which is “Some Results of Two Years’ Investigations of 
Dermacentor venustus Banks in Eastern Montana,” by Mr. Parker, of 
Montana. 
