. Beginners zoology. Zoology. Fig. 136. — Measuring worm, the larva of a moth. Stages : (i) egg, (2) larva, (3) pupa, and (4) imago, or per- fect insect (Figs. 136, 137, 138). The ^g^ stage is one of development, no nourishment being absorbed. The larval stage is one of voracious feed- ing and rapid growth. In the pupa stage no food is taken and there is no growth in size, but rapid devel- opment takes place. In the per- fect stage food is eaten, but no growth in size takes place. In this stage the eggs are produced. When there is very little resemblance between the larva and the imago, and^i©
. Beginners zoology. Zoology. Fig. 136. — Measuring worm, the larva of a moth. Stages : (i) egg, (2) larva, (3) pupa, and (4) imago, or per- fect insect (Figs. 136, 137, 138). The ^g^ stage is one of development, no nourishment being absorbed. The larval stage is one of voracious feed- ing and rapid growth. In the pupa stage no food is taken and there is no growth in size, but rapid devel- opment takes place. In the per- fect stage food is eaten, but no growth in size takes place. In this stage the eggs are produced. When there is very little resemblance between the larva and the imago, and^i© pupal stage, the metamorphosis, or change, is said to be complete. When, as with the grasshopper, no very marked change takes place between the larva and the imago, there being no pupal Fig 13 — Pu a ^^^S^' *^^ metamorphosis Is said to be in- of a mosquito. Complete. By Studying the illustrations and specimens, and by thinking of your past observations of insects, determine which of the insects in the following list have a complete metamorphosis: beetle, house fly, grass- hopper, butterfly, cricket, 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 Coleman, Walter M. Toronto : Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
