On several occasions during the past ten years, and especially at the Brooklyn meeting of the American Association for the Advancement of Science in 1894, the writer has endeavored to show that most of the newspaper stories of deaths from spider bite are either grossly exaggerated or based upon misinformation. He has failed to thoroughly substantiate a single case of death from a so-called spider bite, and has concluded that there is only one spider in the United States which is capable of inflicting a serious bite--viz., _Latrodectus mactans_, a species belonging to a genus of world-wide distribution, the other species of which have universally a bad reputation among the peoples whose country they inhabit. In spite of these conclusions, the accuracy of which has been tested with great care, there occur in the newspapers every year stories of spider bites of great seriousness, often resulting in death or the amputation of a limb. The details of negative evidence and of lack of positive evidence need not be entered upon here, except in so far as to state that in the great majority of these cases the spider supposed to have inflicted the bite is not even seen, while in almost no case is the spider seen to inflict the bite; and it is a well-known fact that there are practically no spiders in our more northern States which are able to pierce the human skin, except upon a portion of the body where the skin is especially delicate and which is seldom exposed. There arises, then, the probability that there are other insects capable of piercing tough skin, the results of whose bites may be more or less painful, the wounds being attributed to spiders on account of the universally bad reputation which these arthropods seem to have. [2] A paper read before Section F of the American Association for the Advancement of Science at the Columbus meeting in August, 1899. [Illustration: DIFFERENT STAGES OF CONORHINUS SANGUISUGUS. Twice natural size. (After Marlatt.)]