ac, ola 
100 per cent kill; checks placed in stacks of 10 pound cornmeal--100 
per cent kill. * * * Flour seems to have a greater affinity for gas 
than any other mill product. When the stacks of bags were taken down 
to recover the check boxes, live insects were noted crawling between 
the bags, indicating that it was impossible to kill insects located be— 
tween the bags where bags were lying directly on others. The experi- 
ment, however, indicates the advisability of continuing similar ware- 
house experiments. It further indicates the importance of knowing the 
adsorption capacity of flour and mill products, not only for warehouse 
fumigation but vault fumigation also." 
Perez Simmons, Fresno, Calif., reports that six experimental fu- 
Migations of dried figs were made by Dwight F. Barnes and Heber C, 
Donohoe, of the Fresno laboratory, in cooperation with a dried—fruit as-— 
sociation of California. The figs were stored in tight chambers. "Do- 
sage rates of 4.36, 5.6, 7.85, and 8.75 pounds of liquid sulphur diox- 
ide per 1,000 cubic feet gave unsatisfactory results, while rates of 
10.8 and 13.96 pounds gave complete mortality. During the last fumi- 
gation, in which a dosage rate of 13.96 pounds was used, the tempera- 
tures ranged from 55° F. at the start to 48° F. at the end. A hot water 
bath, heated by a gasoline torch, was used to warm the sulphur dioxide 
Cylinder, in which a pressure of about 80 pounds per square inch was 
maintained. Inside the chamber the outlet tube was branched and attach- 
ed to four so-called Venturi tubes for mixing the gas with air." 
Mr. Simmons also states that a company dealing in dried fruits 
in California engaged a professional fumigator to fumigate their ware- 
house containing about 290,000 cubic feet capacity and said to contain 
between 450 and 500 tons of figs with hydrocyanic acid gas, "the gas 
being forced into the building through a hose, under its own pressure." 
The rate was said to have been "about 600 pounds (33.1 ounces per cubic 
foot)." At the request of the owners of the figs Mr. Simmons had test 
boxes of fig-infesting insects planted "at l-foot intervals from the 
surface to a depth of 5 feet, in each of 2 piles. After 8-1/2 days, 
when the house waS opened, all insects within 1 foot of the surface 
were dead. Below 1 foot the kills were irregular, ranging from 55 per 
Gent to.100 per cent. All control insects were alive at the end of 
8-1/2 days." 
"Slide mounts of the genitalia of several species of Ephestia, 
prepared by John R. Arnold, were received back on October 30 from Mr. 
Heinrich of the taxonomic unit, who confirmed the identifications, all 
of which were correct," states Mr. Simmons. "By far the most numerous 
species at present is Ephestia figuliella Gregson. In our report to the 
Fig Institute on November 6 we proposed ‘raisin moth' aS a common name 
for this species for the reason that it is most abundant in raisins and 
that the larvae have become quite generally known as ‘raisin worms.'" 
W. D. Reed, in charge of the Tobacco Insect Laboratory at Richmond, 
Va., apparently is not ambitious to have the important new pest of 
