-77- 
Th© great potential importance of WT as an army insecticide was 
first revealed in England by work carried out in the Department of 
Entomology, London School of Hygiene and Tropical Medioine, whioh show- 
ed thtt it possessed a powerful lethal action on lice.— Heilbron (206) * 
Benzooaine, a looal anaesthetio, is being incorporated in the DDT 
louse powder to allay itching. Solution to the problem of making DDT 
louse powder kill the liee faster is more elusive*— Anon* (3). 
On February 21, 1945, it was announced that the Army*s delousing 
emulsion KB IN would be used to treat a limited number of head lioe oases 
among school children in Washington, D» C* [This emulsion, when dilut- 
ed for use, contains 1 percent of BDT, 2 percent of benzocaine, 11 l/3 
peroent of benzyl benzoate and 2 1/3 percent of Tween 80 ; an emulsifier*] 
— Anon* (23) • 
The use of DDT powder for the destruction of body lioe was describ- 
ed by Ahnf eldt (70) . 
More pyrethrum will go into Army and Navy louse powders to speed up 
the present slow aotion of plain DDT powders •— Peaker (290) > 
Phthirus pubis (L*), the crab louse 
DDT is a contact poison.— Domenjot (135) • 
COLEOPTBRA 
Anobiidae 
Lasio derma serricorne (F»), the cigarette beetle 
See Bphestia elutolla *— ^flhite (373 ) • 
Bostrichida® 
Rhizopertha dominioa (F*), *h® lesser grain borer 
The addition of 0*005 peroent of teohnical DDT to seed wheat (12- 
peroent moisture content) killed all introduced adults at the end of the 
first week* In another test the addition of suffioient 3 peroent DDT- 
pyrophyllite dust to give a concentration of 16 p*p»m* of DDT in the 
wheat caused 100 percent mortality in 1 week*— Cotton et al* (120 )* 
Bruohidae 
Bruohus braohlalis Fahraeus, the vetch bruohid 
DDT is the only oontrol yet found effective.— Burtner (98) . 
