horseflies and house-flies by the hundreds, and many another pest, too. [Illustration: _The Hunting Flight._] Ah, yes, there may be some reason for the belief that swallows bring good luck to men.
I once heard of a farmer who said he didn't dare disturb these birds because of a superstition that, if he did, his cows wouldn't give so much milk. Well, maybe they wouldn't if all the flies a colony of swallows could catch were alive to pester his herd; for the happier and more comfortable these animals are, th