The lesson is as follows: "The wasp can sting, and fly as well as the moth, which does not sting.

I hope no wasp will sting me; he is small, but the hawk-moth is large.

The moth eats leaves, but the wasp loves sweet things, and makes a round nest.

If boys take the nest they may be stung: the fish like the wasp-grubs." On this, questions are proposed: Which stings?
Which is small and which large?
Which eats leaves?
Which makes a round nest?
&c.

&c.
To take another instance.