. Elementary entomology. Entomology. GROWTH AND TRANSFORMATIONS OF INSECTS 47 growth of the grasshopper, on the other hand, is gradual and presents no striking changes, and is known as ^it^4no«mpt€te metamorphosis. Growth. The hard, chitinous skin which serves the insect as an outer skeleton has already been described, and furnishes an obvi- ous obstacle to its rapid growth. When the insect has grown to the limit of this outer shell, its predicament is solved in the only possible way, by the skin splitting down the middle of the back and being sloughed off, while the new skin formed beneath th
. Elementary entomology. Entomology. GROWTH AND TRANSFORMATIONS OF INSECTS 47 growth of the grasshopper, on the other hand, is gradual and presents no striking changes, and is known as ^it^4no«mpt€te metamorphosis. Growth. The hard, chitinous skin which serves the insect as an outer skeleton has already been described, and furnishes an obvi- ous obstacle to its rapid growth. When the insect has grown to the limit of this outer shell, its predicament is solved in the only possible way, by the skin splitting down the middle of the back and being sloughed off, while the new skin formed beneath the old one allows further Fig. 57. Nymph of lubber grasshopper (Z?.^ ^^^^^j^_ This proCeSS, reticulata); similar to the adult (rig. 105) in general ° . form, except in lacking wings called molting, OCCUrs in all insects, as well as among other Arthropods, the skin being usually shed some four or five times during growth, though some species molt from ten to twenty times. T Incomplete metamorphosis. Young insects which resemble the adults, as those of the grasshopper, are termed nymphs. After the sec- ond or third molt, small wing pads appear on the back, becoming much larger with the fourth molt, and upon the fifth molt the adult winged insect emerges, to. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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