GRAIN-MOTHS 359 
outward evidence of its work is seen in tiny, round holes through the 
hard outer coating of the grain, showing where adults have emerged. 
Frequently the adult moths, small, buff-colored ‘ millers,” are notice- 
ably abundant, especially at threshing time. 
There are half a dozen or more generations in the course of the year. 
The earliest moths in spring at once fly to the grain fields and two or 
three generations 
are reared in the 
growing kernels. 
The grubs of 
the last are har- 
vested alongwith 
the grain, and 
Fic. 565. — Larve of 
: the work goes on 
the Angoumois 
Grain-moth. En- as long as warm Fy¢. 566.—The Angoumois Grain- 
larged totwicenat- weather lasts. moth. Enlarged and natural size. 
ural size. Original. Original. 
Corn usually be- 
comes infested only after being husked, the moths flying to it and 
laying eggs on it. 
In control, grain should be threshed as soon as harvested. It should 
be stored in tight bins, watched carefully, and if it heats, indicating 
the presence of the pest, should be fumigated at once with carbon 
bisulphide. Corn husked late and 
placed in open cribs out doors 
seldom becomes infested. 
The European Grain-moth (Tinea 
granella Linn.) 
A tiny moth, with brown and 
white spotted wings, lays its eggs 
Fic. 567.—The European Grain- 0D developing grains in the field, its 
moth. Enlarged and natural size. minute grubs feeding within the 
Original. kernels in similar fashion to the 
Angoumois grain moth. It continues to breed in stored grains, 
just as does the other insect named, but its work may readily be 
