ae: 
Toxicity of rotenone to various ticks.-—-H. 0. Schroeder, Browns— 
ville, Tex., reports that "Further tests on the brown dog tick (Rhipi- 
cephalus sanguineus Latr.) and other species substantiate previous re-— 
sults which indicate that resins present in derris root either make 
rotenone more toxic or, more probably, have in themselves a certain de— 
gree of toxicity. One percent precipitated rotenone diluted with tri—- 
poli earth when applied to dogs infested with R. Sanguineus and with 
the Cayenne tick (Amblyomma cajennense (Fab.)) did not produce a sat-— 
isfactory kill of the ticks. Females of the latter species partially 
or well engorged survived the treatment. One percent rotenone in derris 
extract diluted with tripoli earth was decidedly more effective. Ad— 
ditional tests also indicate that a higher percentage of rotenone is re— 
quired to kill all stages of the Pacific Coast tick (Dermacentor nitens 
Neum.) than is necessary for some other species. This is particularly 
true of the advanced nymphal and larval Stages just preceding the molt, 
and is no doubt owing to the quiescent state and the extra protection of 
the skin about to be cast off. This difficulty is not encountered in 
Species attacking dogs, as these species do not molt on the host." 
STORED PRODUCT INSECTS 
Confused flour beetle may live more than three years.—-Reporting 
on adults of Tribolium confusum Duv., Newell E. Good, Silver Spring, 
Md., states that on May 1 one male had attained the age of 3 years, 90 
days, and one female the age of 3 years, 79 days. 
Damage by tobacco moth in warehouse.--"0n April 3 observations 
were made in a tobacco warehouse in Richmond, Va., infested by Ephes— 
tia elutella Hbn.," reports W. D. Reed. He Says: "Five of the most 
heavily infested hogsheads, chosen from 30 that were opened, were ex— 
amined and it was estimated that the larvae had damaged these tobaccos 
15 to 20 percent of the value, or $30 to $40 per hogshead. * * * this 
infestation was not widespread: however, these observations show that 
this insect can inflict serious damage to hogsheads of flue—cured tobac-— 
com! 
Survival of raisin moth larvae in soil of fig orchards.—In a 
cultivated planting of the Mission variety of figs H. C. Donohoe, Fresno, 
Calif., found an average infestation by Ephestia figulilella Greg. 
of 35.4 larvae per fig tree within 8 inches of the trunk, based on an 
examination of the top 3 inches of soil. He states, "Soil belowms 
inches and at greater distances from the trunk of fig trees has thus far 
yielded comparatively few larvae. Although search had been made and 
larvae found in the soil in various locations in previous years, the 
findings made on April 6 to 13 were the first to demonstrate a consider-— 
able infestation in the soil of a fig orchard. This information gives 
uS knowledge of a new environment in which the insect is known to pass 
the winter in considerable numbers." 
A new type of soil sifter used.—-"After trying, with partial suc-— 
cess, to separate larvae of the raisin moth from soil by washing the 

