Archive image from page 574 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 HEMIPTERA. 563 nutritive fluid, successivel}' compressed, is forced up the main canal, and arrives at the œso- phagus ; the sheath of the sucker is often elbowed, or forms an angle. Like other sucking insects, the Hemiptera possess salivaiy vessels. In the majority of the insects of this order the wing-covers are coriaceous, or crustaceous, with the posterior extremity membranous, and forming, as it were, a kind of supplemental pi
Archive image from page 574 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 HEMIPTERA. 563 nutritive fluid, successivel}' compressed, is forced up the main canal, and arrives at the œso- phagus ; the sheath of the sucker is often elbowed, or forms an angle. Like other sucking insects, the Hemiptera possess salivaiy vessels. In the majority of the insects of this order the wing-covers are coriaceous, or crustaceous, with the posterior extremity membranous, and forming, as it were, a kind of supplemental piece ; they nearly always cross each other : those of other Hemiptera are merely thicker and larger than the hind wings, semi-membranous, like the wing-covers of the Orthoptera, and sometimes opaque and coloured, sometimes transparent and veined. The wings have several longitudinal folds. The composition of the thorax begins to exhibit the modifications which we meet with in the following orders. Its anterior segment, hitherto known under the name of corselet [thorax, or more strictly, prothorax], is in many of much less extent, and is incorporated with the second, which is equally exposed. Many possess ocelli, but their number is generally only two. The Hemiptera [like the Orthoptera] exhibit to us, in their three states, the same forms and habits. The only change they undergo consists in the developement of wings, and an increase in the size of the body. I divide the order into two sections \Heteroptera and Homoptera, regarded as distinct orders by many English authors, under the names of Hemiptera and Homoptera]. In the first section, Heteroptera, the rostrum arises from the front of the head, the wing- cases are membranous at the extremity, and the first segment of the thorax is nmch longer than the others, and forms by itself the corselet. The wing-covers and wings are always horizontal, or slightly inclined. This section is composed of two families {Geocorisœ and Hydroco
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