I have used Buhach sprays with great success. Ten pounds of Buhach, with a hundred gallons of water, brought the caterpillars down from the vines in forty-five minutes after spraying. As some, however, recovered, it is best to kill as many as possible of those which fall to the ground by punching them with a stick. The cost of Buhach is, however, great, and the difficulty of encountering favorable weather is such that this remedy is not apt to be extensively used. When the vineyards are threatened by the invasion of the army-worms, or by the striped _Deilephila_ caterpillar, the best remedy consists in trenching. A narrow trench, say one foot or more wide and two feet deep, with perpendicular sides, should immediately be dug around the vineyard. If water is at hand, fill the trench with water, on which some coal-oil may be poured,--enough to cause a film on the surface. If no water can be had, a log or scantling may be continually dragged up and down the furrow or trench, so as to crush the caterpillars before they can crawl out. In many places, however, the trench alone will do the work, as the caterpillars will generally not be able to get up the other side of the trench. What few crawl up can easily be kept down by hand-picking. If certain attractive flowers, such as honey-suckles or petunias, are planted on a small bed in the vineyard, say near the house, the moths will come to them to feed from all the surrounding neighborhood. Only one small bed should be planted on every vineyard. A boy with a butterfly net, posted at each flower bed at sundown, can catch hundreds of moths every evening, and considerably reduce their number and prevent them from breeding. BLACK-KNOT.