But we have something to say about the food of insects. Although it has been already laid down as a general rule, that insects in their perfect state, do not eat in any degree with the voracity they exhibit in the larva form, it is nevertheless true that they do both require and devour food in considerable quantities, and of various kinds. Some, for example, are exclusively _vegetable_ feeders. They attack all the parts of plants, not excepting even the root and the bark. Some, with an elegant taste, select the yellow pollen of flowers for their dainty and delicate food. And others, more refined still in their appetites, will have nothing but the fresh distilled honey that lies hid at the bottom of the flowers, pumping it up by the beautiful spirally-coiled tube which forms a part of their mouth. Need we say these are the butterflies? The fly loves a grain of sugar, or a savoury joint of meat: and to other insects, to use a quotation of Mr. Spence's, which prefer the paper of our Atlases, or maps,--
----"a river and a sea Are a dish of tea, And a kingdom bread and butter."
A large number also are _carnivorous_ creatures: need we mention the spider-tribe? a name of terror to myriads of our summer insect-friends. The beautiful _cicindelæ_, called by Linnæus the "tigers to insects," prey upon the whole insect race, and are endowed with powers of offence and destruction, to a degree sufficient fully to justify this title. In France, we are told, the butchers are very glad to have wasps attend their stalls; since they drive away, and undoubtedly prey upon, the numerous flies which frequent these places. The larger species of ants are equally ferocious, attacking any small soft-bodied insect they may meet with, and when killed dragging it to their nest. The beautiful lady-birds, which we look upon with so much tenderness, remembering the ditty,
"Lady-bird, lady-bird, fly away home, Your house is on fire, your children will burn;"
are in the larva state furious destroyers of other insects, and will gobble up aphides by the score in a very short time. The dragon-fly too stands conspicuous among the insect devourers, not only in its larva but in its perfect condition, and falls upon multitudes of insects, plucking off their wings, and with savage relish devouring their bodies. We are not, however, to suppose that the appetites of carnivorous insects are confined to insect-food. The blow fly lives upon and defiles by depositing its eggs in our butcher's meat. The cockroach will polish a bone as clean as, or cleaner than, any dog will, and, indeed, will consume almost anything that happens to come in its way. Lastly, we may not omit to mention, that some insects have to plunge their armed mouths into our flesh and that of other animals, and to slake their raging thirst in a draught of our life-blood: among which we will only enumerate the musquito, the gnat, and the flea. We need scarcely say, that insects are provided with proper organs of digestion.