Structure and classification of insects . When first liberated from the case the insect is moistand pale, and its organs weak and undeveloped. Itswings, in particular, are very small, and resemble littlebits of leather, but exposure to the air for an hour or two,or even less, will entirely change its character : its wings 34 THE PUPA. will rapidly expand and take their due proportions, itslimbs become tense, and its body assumes the tints andshades of the adult insect, and it flies or hops away tolead a life entirely different in all points from its earlierstages of existence, as the perfect i
Structure and classification of insects . When first liberated from the case the insect is moistand pale, and its organs weak and undeveloped. Itswings, in particular, are very small, and resemble littlebits of leather, but exposure to the air for an hour or two,or even less, will entirely change its character : its wings 34 THE PUPA. will rapidly expand and take their due proportions, itslimbs become tense, and its body assumes the tints andshades of the adult insect, and it flies or hops away tolead a life entirely different in all points from its earlierstages of existence, as the perfect insect orThe Libellula quadrimaculata. STRUCTURE OF ADULT INSECTS. THE IMAGO. 35 CHAPTER V. STRUCTURE OF ADULT INSECTS.—THE IMAGO. We have thus far traced the appearance and progressof the immature insect through its various stages ofEgg, Larva and Pupa; but it is in the Adult Insect orIma(/o, to which we are now to turn our attention, thatwe find some of the most compact and beautiful mechan-ical structures of the entire animal kingdom. The ear-lier stages were each preparatory for this adult condi-tion, and thus we find in the Imago the most definite aswell as beautiful arrangement of parts. For convenience, we will adopt the plan of consider-ing first, the JEjxternal A7iatomy y and second, the In-ternal Atiatomy of the Imago. EXTERNAL STRUCTURE OF THE IMAGO. The External Anatomy refers to the arrangement ofthe apparent parts of the body in relation to each other,and may be more readily used in the ordinary observa-tion and classification of Insects; while the InternalAnatomy treats of the mus
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
