field and hunting spiders, are poisonous, while the web-builders which ensnare their victims are not so. In regard to our spiders, I have caused a large one to bite, so as to draw blood, a kitten three days old, and the kitten has not appeared to suffer in the least on that account.
They are very quiet insects, and never appear disturbed at what goes on about them; neither do they run away and hide in holes and corners, like our common spiders; but if their webs are injured, or they are startled by a noise, they will shake themselves from side to side in their webs, so as to be wholly invisible. Their natural food is insects of all kinds; but they soon learn to eat soft flesh, such as the liver of chickens, for which, as well as for water, they will sometimes stretch themselves and turn in their webs so as to take it from the point of a pin or camel's-hair pencil. Besides water to drink, they require an atmosphere saturated with moisture, like that of their native island, the relative humidity being about seventy on the Hygrodeik scale. If stroked upon the back, they often raise their bodies as a cat does, and sometimes put back a leg to push away your finger. They may be allowed to run over one's person with perfect safety, but, if suddenly seized, will hold on with tooth as well as nail.
They are quite economical, and every few days, when the web has become too dry and dusty for use, will gather it up in a mass, which they stuff into their jaws and masticate for hours, swallowing the gum, but throwing out the rest, with the little particles of dust, in the form of a hard black pellet,—an instance rare, if not indeed unique, of an animal eating a substance already excreted from its body.
Here I must close, though much against my will. It would please me to describe, as it has almost fascinated me to observe, the doings of my spiders, as they grew older and made their webs in the Wardian cases to which they were removed when too many and too large for the jars; how the young are gregarious, and move from place to place in a close column, protected on all sides by skirmishers, which continually report to the main body; how some of these young, whose parents were caught on Long Island, South Carolina, a year ago, and which were hatched from the egg in October last, have grown up during a Northern winter, have themselves become parents and laid eggs; how they periodically cast off their skins, even to that of the eyes, the jaws, and the breathing tubes, and how, from too great impatience, sad accidents sometimes befall them on these occasions; how, also, I have reeled silk from several of these spiders, and made a thread which has been woven in a power-loom as a woof or filling upon a warp of common black silk, so as to make a bit of ribbon two inches wide, thereby proving that it is real silk and can be treated as such.
Much, too, could be said of the only other attempts to utilize spiders' silk, a knowledge of which would have materially aided me. In France, one hundred and fifty years ago, M. Bon made gloves and stockings of silk got by carding spiders' cocoons, and seventy years later, as I have but recently ascertained, Termeyer, a Spaniard, not only used the cocoons, but also, by an observation similar to my own, was led to reel the silk from the living insect. He, however, had poorer spiders or too little perseverance, or friends and a government influenced by a most short-sighted economy and prudence, else the highly interesting and instructive account of his experiments would have been familiar to some one in this country, and would not have waited these many years to be found by accident last spring in an obscure corner of the Astor Library.
I will add, finally, that I believe some other geometrical spiders, especially of the genus Nephila, may be found as docile, and as productive of beautiful silk, as the species I have described. At any rate, you cannot find a more interesting inmate of your Wardian case than some large geometrical spider.
