"Good boy, and here's the knife."

Jack thought he had never seen such a wonderful knife. It had three blades, a corkscrew, a file, and a pair of scissors, and to this day Jack has that knife.

"Come," said Mrs. Reece, "let us all sit down for a few minutes while Lizzie is getting supper ready inside."

"How many wings," asked Mrs. Reece, "has a fly?"

"Four," answered Jimmie.

"No," corrected the guide; "a real fly has only two wings. In the place of the second pair they have queer little knobbed rods which are called balancers—something like the out-riggers on your scull, Jim. These steer and steady the fly's body."

"What makes a fly bite?" asked Hope.

"They do not bite, child. A beetle or a grasshopper can really bite, because beetles and grasshoppers have heavy, horny jaws, toothed on the edge, with which to do it. But a fly has fine, sharp-pointed jaws. With these needlelike jaws they pierce a hole in the skin, then with a tiny sucking-beak, made by the rolled lower lip, they draw up the blood through this opening."

"I wonder whether any little girl here knows why flies should not be allowed in the house?" asked Mrs. Reece. No little girl did know anything except that their mothers were always driving flies out, and that these creatures buzzed and were a nuisance. "Do tell them," said Mrs. Reece.