The fore wings, you see, are larger than the hind ones.

Richard asks, "Where do May flies come from? and why are they called May
flies?"

Now, Richard, one question at a time, if you please, and the last shall
come first because it is easier to answer.

They are called May flies because they often come out in the month of
May, though sometimes not until June, and some species are as late as
July in appearing.

[Illustration]

We shall have to look into the ponds and little streams to discover
where they come from.

See, John has scooped up some little speckled grubs out of the mud. Is
it possible that _they_ are the larvæ of our fairy May flies? _They_
have a mouth!--see what big jaws for such little creatures.

And what do you suppose they eat?

No doubt they, too, live on animal food.

No doubt they move about in the mud and catch what they can.

You see, John had to dig them up; they like to burrow in the weeds and
mud, and some of them even make tunnels of mud in which to protect their