THE GRANARY WEEVIL 
9 
infested with weevils and only prompt treatment prevented very 
severe losses. Hundreds of thousands of tons of wheat were sterilized 
and screened and from every 2,500 bags of wheat so treated between 
200 and 300 pounds of weevils were removed, an enormous number 
when one considers that there are about 442,000 weevils to the pound. 
Although three species of weevils predominated in this wheat, the 
granary weevil is said to have caused the most damage. 
Fig. 4. — Corn kernels showing evidences of injury by the granary weevil. Note long white streaks 
on kernels to right. These indicate burrows of very young larvae of the weevil just beneath surface 
of graiu 
TECHNICAL DESCRIPTION 
THE BEETLE 
(Fig. 1) 
Elongate-oblong, feebly convex. Chestnut brown to piceous, moderately 
shining. Beak two-thirds as long as thorax, slender, cylindrical, finely and 
sparsely punctate. Thorax sparsely punctate, punctures coarse and on the disk 
more or less fusiform. Elytra deeply striate, striae punctured at bottom, not 
serrate; intervals smooth, alternately wider and more elevated, especially toward 
the base; the sutural with a row of elongate punctures. Pygidium coarsely 
cribrate. Body beneath coarsely and less densely punctured than in onjza. 
Length 3 to 4 mm. 
The original description of Linne follows: 
"C. longirostris piceus oblongus, thorace punctate longitudine elytrorum." 
THE EGG 
(Fig. 7, e) 
Egg opaque, shining, white, ovoid to pear-shaped in form, widest below middle, 
bottom broadly rounded, neck narrowing gradually toward top, which is some- 
what flattened and bearing a small rounded protuberance that fits into a cap or 
plug cementing the egg in place. 
Length 0.6S to O.SO mm., width about 0.33 mm. 
72238°— 26 2 
