NUT-WEEVILS — MEALWORM 369 
The adults come out from the ground in spring, and continue emerging 
throughout the summer. When the nuts are large enough, they punc- 
ture them through the husk or 
burr with their long snouts, and 
lay their eggs within. The 
grubs mature usually soon after 
the nuts fall, eat their way 
out, and winter in the soil. 
Nuts should be gathered 
regularly and at frequent in- ; : 
Fic. 589.— Work of the Hickory Nut 
tervals. In the case of chest- Weevil. Original. 
nuts it is wise to fumigate with 
carbon bisulphide immediately after gathering. The gas will pene- 
trate the nuts and kill the weevils, some of which will be so small that 
they have not yet damaged the kernel appreciably. 
The Yellow Mealworm (Tenebrio molitor Linn.) 
Corn meal or similar material is often infested with yellowish or 
brownish worms, an inch long when full grown, their backs shining and 
“ hard-shelled,”’ looking somewhat like wireworms. The adult is a 
a 
Fig. 591.—Adult of the 
Yellow Mealworm. 
Fic. 590.— The Yellow Mealworm. Slightly enlarged. Orig- 
Slightly enlarged. Original. inal. 
dark, oblong beetle, which flies at night, and lays eggs wherever it 
can find suitable material. Treatment consists in a thorough cleaning 
up of waste meal, combined with fumigation or heating of infested 
lots. There is only one generation annually. 
2B 
