Develop an alternative theory about the missing locusts.

There's no mystery here. You've seen the Locust City and its spiralling mud towers. All that's left is to confront the city father himself...

Consider the way the empty trap was disturbed, as though shaken. Most likely the hands of a young person -- hands small enough to fit inside the trap too.

You look down at your hands, but they don't have anything to tell you.

You have your suspicions, but nothing you can form into a viable explanation.