-125- 
At 0.5 percent rotenone content, mortality from the derris bait was 
still considerable, yet no feeding was indicated.— Richardson and 
Seiferle (502). 
ACARTNA 
Acaridae 
(Tyroglyphus ) Tyrophagus putresoentiae (Schr.)"(T. longior Gerv.) 
In tests on oontrol of this mite in mushroom beds in England 
dusts containing pyrethrum, derris, and nicotine were ineffective.— 
Read (494). 
Argasidae 
(Orolthodoros ) Otobius megnini (Duges), the spinose ear tiok 
Derris or cube powder (6 percent of rotenone) mixed with medicinal 
mineral oil (1:10 parts of the oil) and dropped into the ears of dogs 
will kill these ticks.— Bishopp and Smith (57). 
Ornlthodoros moubata (Murray), the Afrioan relapsing fever tick 
Medium petroleum oil was superior to peanut oil as a carrier of 
rotenone in xylenol tested against this tick. The solutions of rote- 
none in xylenol and oil showed no deterioration after storage in the 
darknesb at room temperature for 6 weeks. These solutions proved far 
less toxic than an equal weight of pyrethrin I in medium petroleum oil. 
—Robinson (509) • 
Demodicidae 
Demode x can is Leydig, the dog follicle mite 
In Brazil severe mange, such as oaused on dogs by this mite, is 
best treated by the following lotiont 2 parts of timbo root powder 
are mixed with 10 parts of benzene or carbon tetrachloride, and kept 
for 2 days in a tightly corked bottle. The mixture is then incorporated 
with 100 to 200 parts of dies el oil, cottonseed oil, or even kero- 
sene .—Meyer (414) • 
The most promising remedy for demodeotic or red mange appears to 
be a 1-peroent solution of rotenone in alcohol or oil. The derris wash 
recommended for sarcoptio mange has effected cures in a number of in- 
stances.— Price and Bishopp (475 ) | U. S. Bureau of Entomology and 
Plant Quarantine (627, p. 20). 
