32 THE FIG MOTH. 
ous moth eggshells and the full, rounded abdomens of all but one 
or two of the mites attested to their having made similar meals. 
Their bodies were almost identical in size with the eggs, from which 
they were only distinguished with a lens, and it is fairly certain that 
they were the progeny of a single adult that might have become at- 
tached to one or the other of the parent moths. 
METHODS OF CONTROL. 
The methods for controlling the fig moth in its occurrence in flour 
mills are the same as advised for the eradication of the Mediter- 
ranean flour moth, in which case we depend chiefly upon hydrocyanic- 
acid gas. In the case of smaller inclosures, where bisulphid of carbon 
is generally preferred, this can be used more readily and with about 
the same effect. 
Preliminary work has been done in the fumigation of rice mills 
infested by the fig moth and other species of insects, which indicates 
that, owing to the more open structures where rice milling is in opera- 
tion and the difficulty of closing the many apertures in these mills, 
fumigation is not always practicable. 
A small series of useful experiments was recently conducted by 
Mr. D. K. McMillan and by Mr. M. M. High, while working under 
the writer’s direction in Texas in the fumigation of rice mills. 
Both hydrocyanic-acid gas and bisulphid of carbon were success- 
fully employed after the mills or portions of them had been made as 
tight as could be done economically. 
Carbon bisulphid was used upon adults and larve, chiefly of 
beetles, in rice bran and other materials in tight flour barrels at the 
rate of 5 pounds to 1,000 cubic feet of air space and 10 pounds to 
1,000 cubic feet, each for 12 hours and 24 hours. Adults were killed 
in all four cases and larve in all cases except with the 5 pounds for 
12 hours, where some insects crawled up to the top of the barrel and 
did not get the effect of the gas. 
In fumigating mills at Fort Worth and at Dallas, Tex., Z'phestia 
cautella occurred in each mill in small numbers. 
Cyanid of potash was used in three mills at the rate of 10 ounces 
to 1,000 cubic feet as the weakest dosage. Adults were all killed 
and no living larve were to be found after careful search and 
thorough airing of material. 
In a series of experiments in a fumigating room at Beaumont, 
Tex., the species occurred in sacks of rice bran and polished rice. 
With the dosage of 10 ounces of cyanid of soda to 1,000 cubic feet 
for 12 hours, adults and larve of this species were all killed and 
consequently with heavier dosages for a longer time. 
The effect of cyanid upon the eggs could not be observed, owing to 
inability to find them, 
