See it turn its head around to look at us.
After all, the cockroach is a knowing little fellow.
This one is hungry; it has had nothing to eat for some time. We will
give it this crumb of cake.
Be careful, or it will get away; it can run very fast, and it is very
quick, you see, in all its motions.
Ah, it is examining the crumb with the tips of its long antennæ.
See how daintily it touches the crumb.
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.