“Thanks, it’s kind of you,” murmured Jerry. “But, as a matter of fact, we haven’t been up to any mischief.”

“But what put the professor in this condition?” Jim demanded. “I know he’s always on the lookout for queer bugs and such things, and that he’ll do almost anything to get a rare specimen. But I never saw him quite so badly off as this before, and he seemed very much in earnest about getting to you. Still you know your own business, I s’pose. Hark!”

They all listened. In the corridor outside the sound of rapidly approaching footsteps could be heard.

“There he is!” exclaimed Jerry, as he opened the door.

In the doorway a queer sight stood revealed. A little bald-headed man gazed unblinkingly through the powerful lenses of his spectacles at the four boys. His condition was just about as Jim had described, and the three chums noted the tightly-clenched hand of the “bugologist,” as the delightful scientist was dubbed behind his back, though with no disrespect attached to it, for the boys were very fond of him.

“Ah, Ned, Bob and Jerry, I am very glad to find you in,” began Professor Snodgrass, with a little jerky bow.

“It’s a good deal better than being found out, sometimes,” murmured Jim. The professor, not having heard the comment, nodded in friendly fashion to the pitcher.

“What has happened?” asked Ned, as he pushed forward a chair for the little man. The teacher seemed rather out of breath and considerably excited.

“What’s the matter?” chimed in Bob. “Is everything all right?”