4-H CLUB INSECT MANUAL 23 
shown here is the adult of the flatheaded apple-tree borer (Chryso- 
bothris femorata). It is about one-half an inch long. 
Granary weevil.—There is a weevil, rather elongated—about one- - 
eighth of an inch in length—with a long nose, and 
chestnut brown in color. The size of this insect 
may be compared to the grain of wheat upon which 
it rests. This weevil lives indoors and attacks vari- 
ous kinds of stored grains, often doing considerable 
damage. The chewing jaws of the adults are located 
at the end of the long, snoutlike head. Hind wings 
or the ones used in flight are absent, so that the 
insect can move about only by crawling. Like all 
other Coleoptera, the weevils have four stages in 
their life cycle—egg, larva, pupa, and adult. This 
insect may have several generations a year, depend- 
ing on the temperature. Fumigation and residual 
sprays give the most effective control. The scientific  geurn54.—Gran- 
name of this insect is Sttophilus granarius. ary weevil. 
Bean weevil.—Entomologists are often asked during the winter or 
early in the spring for information about infestations of a rather 
small insect about one-eighth of an inch long discovered flying about 
the house and windows, or perhaps by some housewife when pre- 
paring dry beans for cooking. This insect has a body that tapers 
sharply to the head, four wings, and a few white markings on its 
back. ‘The adults fly rather readily to the green beans 
in the field and lay their eggs in the pods. Soon after 
hatching, the larvae burrow inside the bean and con- 
tinue to develop with it. Small circular holes often seen 
in dry beans indicate that the beans have been infested 
and the weevils have left the bean through these holes. 
When the dry beans are placed in storage, if the weather 
is warm, the insects continue to breed all the year 
FIGURE 55 — through, but when the weather is cold the larvae remain 
" inactive. The bean weevil belongs to the order Cole- 
optera, and is called Acanthoscelides obtectus. It may be controlled 
by fumigation or heating. 
LEPIDOPTERA (BUTTERFLIES AND OTHERS) 
Where is the boy or girl who never chased a butterfly? But did 
this boy or girl ever consider that the butterfly came from a small 
worm, or larva as the entomologists call it? Butterflies, moths, and 
skippers have a great deal in common. Their life cycles are the 
same in that they consist of four distinct stages, the egg, the cater- 
pillar (or feeding stage), the pupa (or resting stage), and the adult 
butterfly or moth (the reproducing stage). The butterfly, pupa, and 
larva are quite unlike one another in appearance. This group of 
insects carries the name “Lepidoptera,” which means “scale wings,” 
and everyone who has handled a butterfly or moth knows that the 
four wings are covered with a fine scaly powder which, when brushed 
off, leaves a clear wing. The butterflies and moths have sucking- 
type mouth parts, but the young, or caterpillars, have chewing mouth 
arts. 
: Cabbage butterfly.—Possibly one of the most common of these 
butterflies is the little white cabbage butterfly, which has a wing 
