372 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
These results indicate that amyl acetate adds nothing to the attrac¬ 
tiveness of poison bait for earwigs. 
Another series of tests was made using wheat bran sweetened with 
molasses, and the same flavored with anise oil, meat extract and glycerin. 
These were placed out in sets of four piles each, one of each mixture. 
There were four sets containing all four mixtures and the number of 
earwigs feeding were counted at two different times during the night 
with the following totals: 
Plain 18 Meat Extract 19 
Glycerin 64 Anise oil 18 
Four other sets containing only plain bran and molasses and the same 
flavored with meat extract gave the following totals. 
Plain 17. Meat extract 29. 
In these tests glycerin seemed to be the only material with very 
marked value, but further tests were needed to confirm this. At 
least it did not act as a repellant and its moisture retaining properties 
were quite valuable. On the following evening, the other mixtures 
were quite dry and hard while that containing glycerin was still moist 
enough to attract a good many earwigs. 
During the second season’s work further tests of mixtures containing 
molasses and glycerin were made. In the first series, water and molasses 
were mixed in proportions of two to one, and glycerin added to this to 
make 50%, 25%, and 12.5% solutions. Wheat bran was saturated 
with each mixture, and the 25% of glycerin mixture was also used with 
rice bran and oat hulls. These five mixtures were placed in small 
piles nearly a foot apart along a narrow board which was placed on the 
ground in a spot where earwigs were plentiful. Three counts of the ear¬ 
wigs feeding were made at about ten minute intervals. The insects 
were then driven off and the board was reversed and three other counts 
taken. The results were as follows, in the order of position on the 
board: 
1 
Wheat bran 
Gly. 50% 
Mol. 16.6% 
2 
Wheat bran 
Gly. 25% 
Mol. 25% 
3 
Wheat Br. 
Gly. 12.5% 
Mol. 29.16 
4 
Rice bran 
Gly. 25% 
Mol. 25% 
5 
Oat hulls 
Gly. 25% 
Mol. 25% 
3 counts.. . . 
22 
22 
21 
42 
70 
Reversed 
order 
3 counts. . . . 
100 
84 
86 
64 
102 
Total. 
122 
106 
107 
106 
172 
Knowing that two piles at either end of the board would attract more 
