APHIDES, or PLANT LICE. These belong to the order Homoptera, meaning "same winged," and the name has reference to the fact that the fore wings are uniform in their structure from base to apex, not divided into a leathery base and a membranous tip. Aphides are all minute in size, soft bodied, and generally long legged; the mouth is furnished with a curiously-constructed beak, or rostrum, for sucking the juice of plants; the antennae, or feelers, are long and slender; the legs have usually two joints in the tarsi, one of which is generally very ill-developed; and near the tip of the abdomen, on the back of a ring, in many kinds, stand two prominent tubes, called honey-tubes, from which a sweet secretion, much sought after by ants, is emitted. They are very destructive, and nearly every plant has its own peculiar Aphis; but among the worst are the cherry fly and bean fly. All these insects are very destructive to the young shoots and foliage of plants, on which they cluster in large numbers, sometimes completely hiding the stems, increasing with marvellous rapidity. They produce eggs in autumn, which lie dormant through the winter, and upon the approach of warm weather in spring, hatch and produce individuals which, during the summer, are viviparous, budding off young insects at a surprising rate, which quickly in turn become possessed of the same marvellous power; hence the enormous number which are produced in so surprisingly short a time. It has been computed that in a few weeks many millions of young might be produced directly or descended from a single female. See also Black Fly and Bean Fly. The following remedies may be successfully employed: Tobacco. This is applied, as a rule, in three forms, each of which is useful for particular purposes. Tobacco powder is useful as a dry application to plants where, from any cause, the other modes of employing it are not desirable. It causes no smell, and is useful in conservatories, &c., for that reason. The mode of applying it is to dredge or dust it over the foliage of the plants affected, and to syringe off in from three to thirty hours, according to the nature of the plants. Fumigation with tobacco, if done in a proper way, is very effective, but it leaves an unpleasant smell. The foliage of the plants should be quite dry, and a still day must be chosen for the work; the house should be filled with smoke, but no flame must arise in the burning. The plants should be well syringed the next morning, and full ventilation allowed; if the fumigation is repeated twice or thrice, it will prove very effectual. Tobacco water is made by soaking a pound of coarse shag in 6gals. of hot water, to which 1/2lb. of size or soft soap has been added. The plants should be dipped into or syringed with this mixture, and well syringed with clean tepid water about twelve hours after. It should not be employed for plants having woolly or hairy foliage. Tobacco paper and cloth are used for fumigating in the same manner as tobacco; but as they vary in strength, more care is necessary, as they sometimes cause the leaves to become spotted. Judiciously employed, they are cheaper than Tobacco. Quassia. Boil 1lb. quassia chips in 4gals. of soft water, for about ten minutes, and after straining off the chips, add 1lb. of soft soap. Apply in the same way as Tobacco water, and syringe the plants with clean water after ten minutes or a quarter of an hour. Soft Soap. This, in proportion of 8lb. to 12gals. of rain water, and 1gal. of tobacco water added after it is cold, is a cheap and good remedy out of doors, and requires the same mode of application as tobacco water. Soap Suds. Where bleaching powder, or much soda, is not mixed with these, they make a good insect killer for hard-foliaged plants, but should be washed off with clean water in twelve hours. No mixture containing chloride of lime should be used. Various. Fir-tree Oil, Gishurst's Compound, and Fowler's Insecticide, are all serviceable, if used as directed on the labels. Hardeman's Beetle Powder, applied with the little French powder-bellows which is sold with it, is very efficacious. For outdoor work, nothing surpasses clean cold water, applied often and forcibly with a syringe. The best mode of clearing Aphis off Beans, Currants, &c., is to remove the tops of the infested shoots, and to wash the plants with soapy water, or a solution of Gishurst's Compound. In some cases, a good dusting with soot and wood ashes, while the plants are wet, will keep them in check. The "Golden Eyes" or "Lacewing" fly, and also ladybirds, are to be encouraged, as the larvae of each of these wage incessant war against Aphides, especially the green varieties, and thin them out considerably.