MICHIGAN ACADEMY OF SCIENCE. 
207 
TABLE III.— INSECTICIDAL VALUES. 
EFFECTS ON CIMEX LECTULARIUS (BED BUGS), WHEN DIPPED IN VARIOUS 
DILUTIONS. 
Dilution. 
Time. 
Number of 
insects dipped. 
Result. 
(1) Arsenic in alkaline solution 
1:1000 
1 minute 
(i 
dead 
1:1400 
1 “ 
4 
alive 
(2) Alcohol 
50% 
1 minute 
2 
alive 
70% 
1 “ 
2 ' 
u 
80% 
l “ 
4 
" 
94% 
1 “ 
0 
dead 
(3) Carbolic Acid in aqueous solution 
1:50 
1 minute 
4 
alive 
1:20 
1 “ 
4 
44 
1:20 
2 minutes 
2 
dead 
(4) Carbolic Acid and Soap 1-1 
1:100 
1 minute 
2 
alive 
1:50 
1 “ 
4 
u 
1:33 
1 “ 
4 
dead 
(5) Coal Tar Disinfectant 
1:75 
1 minute 
4 
dead 
1:100 
1 
5 
alive 
(6) Coal Tar Insecticide 
1 :500 
1 minute 
4 
dead 
1:1000 
L “ 
8 
u 
1:1500 
1 “ 
12 
u 
1:2000 
1 “ 
4 
te 
1:2500 
1 “ 
10 
alive 
(7) Cresylic Acid and Soap 
1:100 
1 minute 
4 
alive 
1:50 
1 
2 
u 
V 
1:50 
1 
4 
dead 
(8) Morphine Sulphate 
1:50 
1 minute 
4 
alive 
1:100 
1 “ 
4 
(( 
(9) Nicotine 10% 
1:20 
1 minute 
3 
dead 
1:30 
1 “ 
0 
alive 
(10) Potassium Cyanide 
1:100 
1 minute 
0 
dead 
1:200 
1 “ 
4 
alive 
1:300 
1 “ 
2 
u 
(11) Mercuric Chloride 
1:15 
1 minute 
4 
alive 
1:30 
1 “ 
(1 
tk 
1 :50 
1 “ 
4 
u 
(12) Mercuric Iodide in the form of Germi- 
1:15 
1 minute 
4 
dead 
cidal Discs 
1:30 
1 “ 
4 
alive 
1:50 
1 “ 
4 
(( 
(13) Linseed Oil Soap 
1:200 
1 minute 
8 
alive 
1:100 
1 “ 
10 
dead 
1:50 
1 “ 
4 
ti 
(14) Formaldehyde 40% . 
1:5 
1 minute 
4 
dead 
1:10 
1 “ 
4 
alive 
(15) Turpentine Emulsion 
1 :750 
1 minute 
8 
dead 
1:1000 
l 
8 
alive 
