79 
cealed within them. Gasoline and benzine are both excellent for this 
purpose, provided fire and lights be kept away from them until 
they have evaporated, as of course they presently do. They may 
be applied in any convenient way—by brushing, sprinkling, or 
spraying, according to the conditions present. They act at once 
upon contact, and if doors and windows are opened immediately 
after the application the vapors will soon disappear. 
A Key for the Identification of Granary Insects 
This table is introduced to enable practical grain men and 
millers to identify insects found injuring stored grains and their 
products. It is simply a working table for the most important of 
these insects, and does not include, of course, all insects to be 
found in stored grain or in mills, some of which may be merely 
feeding on debris. The table is as free from technicalities as it is 
possible to make it. It should be remembered that all of these 
insects have four distinct stages of development, proceeding in 
succession from the egg to larva, pupa, and adult; also that all 
adult insects have six legs, neither more nor less, and that all here 
considered have two pairs of wings. 
A. Moths or millers; the larva a caterpillar with distinct head, 
three pairs of thoracic legs and five pairs of abdominal legs, 
one of these pairs on the last segment. The larva usually 
spins a cocoon; the pupa is brownish, its appendages not 
free. The adult insects have two pairs of wings, the front 
pair longer and usually more colored than the lower or hind 
pair, which are usually grayish. Their bodies are soft, pliable, 
and covered with microscopic scales, like dust, and fine hairs. 
Insects of medium size, usually about half an inch long. 
a. A small whitish caterpillar, living in grains of corn or wheat, 
eating out the embryo and other soft portions, pupating 
within the grain, and emerging thru a round hole at or near 
the tip of the kernel; this hole is covered with silk. Badly 
infested ears of corn look as if riddled with shot. Adult 
moths grayish clay-yellow, small. 
. The Angoumois Grain Moth. 
aa. Caterpillars which spin much silk, usually forming a silken 
tube to which they retire; this tube covered with particles 
of whatever substance they happen to be feeding upon. 
Living in flour, meal, or chaff, sometimes among grain, or 
in food substances such as prepared cereals. . The full- 
grown caterpillars make a cocoon. 
b. A free-living caterpillar usually not concealed within a 
silken tube, olive-green to pinkish in color, infesting 
grain or meal, webbing particles together, covering bags 
