Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . resentthese structures in other insects. The Egg.—In shape the eggs of insects are usually eithermore or less spherical or oval. The shell which envelopsthem is called the chorion. It is dense and brittle, andoften covered by a delicate mosaic-work of more or lessregular facets. In those of many moths the surface is finelygranulated, while in those of most butterflies the surface isbeautifully ornamented with ribs and furrows. In some eggs there are radiating appendages at one end,as in those of Nepa
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . resentthese structures in other insects. The Egg.—In shape the eggs of insects are usually eithermore or less spherical or oval. The shell which envelopsthem is called the chorion. It is dense and brittle, andoften covered by a delicate mosaic-work of more or lessregular facets. In those of many moths the surface is finelygranulated, while in those of most butterflies the surface isbeautifully ornamented with ribs and furrows. In some eggs there are radiating appendages at one end,as in those of Nepa (Fig. 30, o), which surround the micro-pyle; this being a microscopic opening through which aspermatic particle enters to fertilize the egg. The mosquito lays its slender cylindrical eggs gluedtogether in a boat-shaped mass, which floats on the surfaceof pools or cisterns; the Copris beetle, or tumble-bug, GROWTH AND METAMORPHOSIS OF INSECTS. 35 places its egg in the centre of a ball of dung, which it rollsaway to a secure place; the flesh-fly oviposits on fresh or b c d e f g h i k I a.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
