30 
Circular 23 - Reference Index 
Human bot fly ( Derma - 
tobia hominus ) ( Cont * d ) 
larvicides 
benzene 8-20; 21-9. 
chloroform. . .8-20. 
prevention 8-20. 
treatment 8-20. 
Human flea ( Pulex ir - 
ritans (L. )T~ 
female ( illus. )13-3. 
in tropical America 
13-4. 
in U. S 13-3. 
Human lice 
biology 9-3. 
control 9-8. 
dissemination. . .9-7. 
kinds 9-2. 
Hydrocyanic acid gas 
characteristics and 
uses as fumigant 
21-37; 22-15. 
control of lice in 
clothing 9-14. 
control of lice in 
quarters 9-15. 
effect on man 22-16. 
fumigation 
barracks and 
houses 22-38. 
cost 22-16. 
cured meats... 5-9. 
warehouses. .22-23. 
precautions in use 
21-38,39; 22-15. 
sources 
calcium cyanide 
21-38; 22-34. 
hydrocyanic acid 
discoids 
21-38; 22-31. 
liquid hydrocyanic 
acid 22-23. 
sodium cyanide and 
sulphuric acid 
..21-38,75; 22-26. 
ventilation of ware- 
house after fumiga- 
tion with 22-36. 
ways of producing 
Hydrocyanic acid discoids 
manufacturers and 
distributors 
21-40; 22-52. 
precaution 
•••.••••21—38; 22—33* 
price 21-39. 
use in fumigation 
21-38; 22-31. 
Hydrogen peroxide 
alleviation of insect 
bites. . .13-9; 21-40. 
characteristics ; 
availability; cost 
21-40. 
precaution in storing 
21-40. 
Immersion treatment 
(wood products) 
control powder-post 
beetles 6-11. 
Impregnation (of wood) 
termite prevention 
2-13. 
Indian meal moth 
as food insect. . .4-1. 
in corn meal (illus.) 
4-2. 
Insect powders 
preparation of those 
containing pyrethrum 
21-65. 
