-Ill- 
Infusions of Derris philippinensis were tested in the Philippine 
Islands against sucking lice on 2 cows and 11 water buffaloes, and 
against biting lice on a horse. Complete mortality of lice was ob- 
tained in every test with an infusion of fresh roots. Sucking lice 
removed from the host and immersed in an infusion for 20 seconds were 
apparently unaffected, and it was concluded that the lice were killed 
on the animal by ingesting some of the poison when they inserted the 
proboscis into the skin. Infusions of crushed dry roots of Derris 
sp. were very destructive to suoking lice on the cattle and buffaloes .~ 
Gapuz (215 ). 
On all the ranges in British Columbia where the derris treat- 
ment has been applied, cattle lice have ceased to give trouble.-- Gunn 
(248). 
In a review it is stated that derris is particularly suitable for 
control of fleas and certain forms of lice on animals and human beings. 
—Freak (199). 
The rotenone treatment was preferred to the sodium fluoride treat- 
ment for the control of both sucking and biting lice of cat tie .--Idaho 
Agricultural College (305 ) • 
In a preliminary note on a fish-poison plant (Calopogonium vellutium 
Benth), called catinga de macaco in Brazil, satisfactory results were 
obtained with the alooholic extract against lice and ticks. By use of 
the Jones-Smith Durham color test, the extract appeared to contain- rote- 
none.— Ildefonso Ramos (306 ) • 
Derris powder diluted with flour or talc (1:3) was reoommended 
for control of cattle lice. A second treatment should be given in 
about 11 or 12 days.-- \Jones (325) . 
To combat ectoparasites in Brazil, use tinbo powder or extract. To 
combat lice or fleas, put a little of the powder in the place most in- 
fested. The extract can be oombined with fats, castor oil, vaseline, al- 
cohol, or kerosene.— Meyer (416) . 
With wartime restrictions upon rotenone and pyrethrum, both used 
for lice control, a 1-percent nicotine dust with sulfur as a carrier was 
the most effective substitute available in 1943.— Munro and Telford (436 ). 
A formula effective for lioe on livestock, applied at 14- to 16-day 
intervals, contains 10 pounds of cube or derris (5 percent of rotenone), 
100 pounds of wettable sulfur, and 1,000 gallons of water.— Thorns sen 
and Doner (591) • 
