It can smell with its antennæ, you know.

Now it has decided the cake is good to eat.

See how eager it is!

[Illustration]

It almost stands on its head to reach just the part it wants.

John says he does not understand how insects smell with their antennæ.

I can tell you a little about it, John.

If you look at one of the cockroach's antennæ under the magnifying
glass, you will see it is made up of a good many short pieces, or
segments, as we call them, fastened together end to end.

Yes, Mollie, that is why it can move about so easily. It can curl up
like a whiplash, you see.

Next the head is a round segment that fits into a socket.

[Illustration]

Double up your right fist and fit it into the half-closed palm of your
left hand.

There! That is like the ball-and-socket joint.