The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . a case), theadmirably constructed works of the hive, the maternal caresof the spider, which guards its bundle of eggs with inces-sant care, carrying them about with it beneath its body;the ingenuity of the cocoon * of the emperor moth, which * The cocoon of this moth is of a brown colour, and shaped somewhatlike a flask. It is composed of a solid tissue of layers of silk, almost thetexture of parchment; but at the narrow end it is c
The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . a case), theadmirably constructed works of the hive, the maternal caresof the spider, which guards its bundle of eggs with inces-sant care, carrying them about with it beneath its body;the ingenuity of the cocoon * of the emperor moth, which * The cocoon of this moth is of a brown colour, and shaped somewhatlike a flask. It is composed of a solid tissue of layers of silk, almost thetexture of parchment; but at the narrow end it is composed of a series STRUCTURE OF COCOON OF EMPEROR MOTH. 9 is constructed mth an elastic aperture, preventing the en-trance of enemies, but allowing exit to the inhabitant;the numberless progeny of the aphis, the powerful flightof the locust, the leap of the elater and grasshopper,the brilhant Ught of the glow-worm, the instinct of thesexton-beetles (Necrophorus), the mottled jacket of thelai-va of the clothes-moth, formed of diflferent colouredwool, or the excrementitious covering of the larva of theCassida, the frothy abode of the Cercopis, the abandoned. Cassida viridis in its different states. shell inhabited by the hermit crab, and the extraordinarygall residences of the Cynipidce: all these, and a thousandother not less interesting circumstances exhibited, and to of loosely attached longitudinal threads, converging like so many bristlesto a blunt point, in the middle of which is a circular opening, through which the moth makes its es-cape, the threads readily yield-ing to pressure from within, andacting somewhat upon the prin-ciple of the wires of the openingto a rat-trap, or the willow cricksof an eel-trunk. In order, how-ever, to guard against the dangerwhich might arise from the open-ing permitting the ingress of ich-neumons or other enemies, thecaterpillar constructs within thefunnel-shaped mouth a secondfunnel formed of a similar series of threads converging to a poi
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Keywords: ., bookau, bookcentury1800, booksubjectcrustacea, booksubjectinsects
