In Figure 15, _d_, on the contrary, it is the second and third stripes--not the third and fourth--counting from the outside, that are united behind, and the leg is entirely pale, except a black spot on the middle of the front of the thigh. The eggs (Fig. 14, _a_, _a_, and Fig. 15, _d_, _d_) are yellow, and are always laid on the under side of the leaf in patches of from twenty to thirty; those of the bogus are of a lighter color. Each female of the true Colorado potato-bug lays, according to Dr. Schirmer, about seven hundred eggs. In about six days the eggs hatch into larvae, which feed on the foliage of the potato plant about seventeen days; they then descend to the ground, where they change into pupae at the surface of the earth. The perfect beetle appears about ten to fourteen days after the pupa is formed, begins to pair in about seven days, and on the fourteenth day begins to deposit her eggs. There are three broods of this insect every year. Neither geese, ducks, turkeys, nor barn-yard fowl will touch the larva of the Colorado potato-bug when it is offered to them, and there are numerous authentic cases on record where persons who have scalded to death quantities of these larvae, and inhaled the fumes of their bodies, have been taken seriously ill, and even been confined to their beds for many days in consequence. It is also reported to have produced poisonous effects on several persons who handled them incautiously with naked hands. Various plans have been tried to destroy this persistent enemy of the potato plant. Powdered hellebore is said to have been used with effect as a means of destroying the pest. It should be dusted on and under the foliage when the plant is wet with dew. Hellebore, however, is a dangerous remedy on account of its poisonous qualities. A mixture of one part salt, ten parts soap, and twenty parts water, applied to every part of the plants with a syringe, is quite effectual. Several cannibal and one parasitic insect are known to prey upon the larva of the Colorado potato-bug, and the eggs in vast numbers are eaten by several species of lady-birds and their larva. GENERAL REMARKS ON INSECTS. The time is not far distant when the American farmer will be obliged to put forth greater efforts to destroy noxious insects than he has hitherto. It is a well-known fact that noxious insects are increasing in a rapid rate throughout every part of our land. The country is becoming so "buggy" that eternal vigilance is the price of every thing produced from the soil. Close observers calculate that more fruits of various kinds and varieties are annually destroyed or rendered worthless by insects than are gathered and used by man. The cotton-worm, the wheat-midge, the canker-worms, the potato-bugs, are each every year increasing in numbers and destructiveness. The "curculio" alone destroys millions of dollars' worth of fruit annually.