LICE. There are so many forms of these ver min infesting animals and plants, that an enum eration of the various species and a description of their habits would fill many large volumes, as vari ous genera of plants and animals have their dis tinct parasites. Some plants and animals are difficult to keep clear of parasites, but as a rule, lice will not. be found on either when in a state of perfect health. Snuff, tobacco-water, ashes, lime, soot, dust, and various other substances are employed to remove them. The best means of prevention however, is to keep the animal in per fect health, watching for the first appearance of the parasites. These usually are brought into flocks and herds by infested animals, and conse quently when strange stock is bought, if thin in flesh, they should be carefully examined. The forms of lice in animals are many, each species however, having its particular forms. Human lice are of three principal forms. The head louse (pedie ulus humanis), the body louse (P. vesta thenti) and the crab louse (P. pubis). The three forms are given below. Scab in sheep, mange and itch, are often attributed to lice. These are, indeed, caused by parasites which burrow under the skin, and may be destroyed by the same gen eral means that will kill lice; that is by dipping in a decoction of tobacco-water to which flowers of sulphur is added. True lice, however, and ticks
also, being confined to the surface and not under the skin may be destroyed by gentler means. On cattle, by an application of a preparation of lard oil and creosote, in the proportion of four parts of the first to one part of the latter. On horses, they may be clipped, and washed with a decoction of two ounces of powdered stavesacre seed in one quart of boiling water, applied cool, care being taken that the animal does not lick the wash, will be effectual. In mild cases, an ointment of two ounces of Scotch snuff thoroughly mixed with six ounces of lard will suffice, or one drachm of calomel and one ounce of crude petroleum, will not only kill the lice but allay the irritation. Hen lice are often irritating to horses. They usually congregate about the roots of the tail and mane. They are alrnost microscopic and hence not readily noticed. When found they should be eradicated. with the last named remedy, and all parts of the stables whitewashed with lime, in which carbolic acid has been dissolved.