A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . 154 TEXT-BOOK OF ENTOMOLOGY of the wing-membrane, which is very extensive and complicated, and thereforeindicates the performance of an important function, perhaps of a kind ofbalancing sense, and also that these same insect wings, with their delicatemembrane, are very easily affected by different outside agents, as, for instance,warmth, currents of air, etc. Usually in their inactive or passiv
A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . 154 TEXT-BOOK OF ENTOMOLOGY of the wing-membrane, which is very extensive and complicated, and thereforeindicates the performance of an important function, perhaps of a kind ofbalancing sense, and also that these same insect wings, with their delicatemembrane, are very easily affected by different outside agents, as, for instance,warmth, currents of air, etc. Usually in their inactive or passive state the wings are held offhorizontally from the body during flight, and are laid upon the backagain when the insect alights ; but an exception occurs in mostbutterflies and Neuroptera, among which the wing-joint allows onlyone movement round the oblique and long axis of the wings. From
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
