. Agricultural zoology. Zoology. INSECTS. 91 (Fig. 62, left), and fully developed wings are only present after the last moult. The ovipositors of female insects, in those cases where the metamorphosis is incomplete, first appear as fulty developed organs in the perfect condition of the animal, but begin to develop in the preceding stage. In eases of this kind of metamorphosis the young insect ("larva") closely resembles the adult in form even in the first stage of development. In insects undergoing complete metamorphosis the difference between larva and adult insect (imago) is much g
. Agricultural zoology. Zoology. INSECTS. 91 (Fig. 62, left), and fully developed wings are only present after the last moult. The ovipositors of female insects, in those cases where the metamorphosis is incomplete, first appear as fulty developed organs in the perfect condition of the animal, but begin to develop in the preceding stage. In eases of this kind of metamorphosis the young insect ("larva") closely resembles the adult in form even in the first stage of development. In insects undergoing complete metamorphosis the difference between larva and adult insect (imago) is much greater (Figs. 60, 61, 65).. Fig. 65.—The CommoQ Cockchafer (^Meloloniha vulgaris). Larva, pupa, female flying, and male creeping out of the earth. The time passed in the pupa state by insects with complete metamorphosis is by no means always of the same length. For example, there are two genera- tions annually of the cabbage white butterfly; one lives through the winter in the pupa state, the pupse of the other are found in summer. So that while an insect of the winter generation lives about half a year in the pupa state, this condition lasts only about a month in the summer generation. A higher tempera- ture hastens the development. Although the insect in the pupa state takes no. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bos, Jan Ritzema, 1850-1928; Ainsworth Davis, J. R. (James Richard), 1861-1934. London, Chapman & Hall, Ld.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
