. Elements of zoology, or, Natural history of animals / ed. by Reese. Zoology. METAMORPHOSIS OF INSECTS. OCT able change, ceasing to take food, and apparently losing all appearance of vitality. In this state it is termed the pupa, or chrysalis. Many larvae enclose themselves in a silken cocoon, or in some other kind of envelope, before under- going this change, and remain in it during the whole period of inactivity, which is sometimes many months in duration. Others bury themselves in the ground ; and others, again, suspend themselves in the air. The pupse of different orders of insects v
. Elements of zoology, or, Natural history of animals / ed. by Reese. Zoology. METAMORPHOSIS OF INSECTS. OCT able change, ceasing to take food, and apparently losing all appearance of vitality. In this state it is termed the pupa, or chrysalis. Many larvae enclose themselves in a silken cocoon, or in some other kind of envelope, before under- going this change, and remain in it during the whole period of inactivity, which is sometimes many months in duration. Others bury themselves in the ground ; and others, again, suspend themselves in the air. The pupse of different orders of insects vary, like the larvae, both in form and in degree of torpor. Some have the whole body enclosed in a horny case, without vestige of members, and are totally inactive, except when disturbed ; whilst others present the general form of the perfect insect, but appear as if the body and limbs were separately bandaged, and laid in close opposition ; whilst others retain all their limbs free, and suffer no diminution in their locomotive powers or in their appetite for food ; these, indeed, can scarcely be said to pass into the pupa state at all, their condition being only indicated by the gradual development of the wings. This development is equally taking place beneath the en- velope of the pupx that are enclosed and inactive. 474. The perfect insect, or i?nago, when it emerges from its pupa case, ex- hibits in all respects the form which is charac- teristic of the species, and, in general, the size also ; few growing much after they have attained this condition, and many scarcely eating at all. As already mentioned, the twelve segments forming the body of the larva may still be recognised here, but very much changed in their character. The three anterior ones are r^tt^^n^y»^=>^»c^^=a. 521. What of the pupa or chrysalis ?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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