INSECTS INJURIOUS TO THE HOUSEHOLD AND ANNOYING TO MAN - 1914 - INTRODUCTION - SOME one has remarked in a rather facetious vein that, from a zoological standpoint, the present age may be called the age of insects. On second thought, the remark holds more reason than might appear at first sight. We are especially impressed with the importance of the relation to man of these tiny, but multitudinous, forms of life when we recall that the species of insects outnumber the species of all other animals combined that the insect pests in this country alone cause a loss of over a billion dollars annually that several hundred trained men in the United States are giving their entire time to a study of these pests and that thousands of letters are sent each year to our government agencies, requesting information regarding insects and means of fighting them. Until within the last few years the economic importance of insects has been attributed to their indirect injuries to man through attacks on the things that he produces. Suddenly, almost within the last decade, insects have assumed an entirely new and exceedingly important significance through knowledge of their direct injuries to man himself. Since the epoch-making discoveries were made that mosquitoes carry malaria and yellow fever, insects, especially those frequenting the household, have assumed a most unexpected importance. The hum of the mosquito and the buzz of the house-fly have become fraught with an entirely new significance. Even the dog and the cat, with their burdens of fleas, have taken on a new aspect and appeal to us from an entirely new viewpoint. The kitchen drain, the open cesspool and closet, the barnyard manure pile, the horsestable, and the hog pen present entirely new problems to the occupants of the farm home through the insects that originate in them. One neglected manure pile can furnish enough house-flies to overrun several households all the summer through...