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 . d. Ges. natur- forsch. Freunde zu Berlin, 1881, pp. 163-166.) Redtenbacher, Josef. Uebersicht der Myrmeleonidenlarven. (Denkschrift. Cl. k. Akad. Wiss. Wien, 1884, xlviii, pp. 335-368, 7 Taf.)Schiodte, J. G. Ue metamorphosi Eleutheratorum. Bidrag til insekternes udviklingshistorie. (Kroyers Naturhist. Tidsskrift. Kjobenhavn. 12 Teile mit 88 Taf., 1862-1883.) j. Embryonic stages
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 . d. Ges. natur- forsch. Freunde zu Berlin, 1881, pp. 163-166.) Redtenbacher, Josef. Uebersicht der Myrmeleonidenlarven. (Denkschrift. Cl. k. Akad. Wiss. Wien, 1884, xlviii, pp. 335-368, 7 Taf.)Schiodte, J. G. Ue metamorphosi Eleutheratorum. Bidrag til insekternes udviklingshistorie. (Kroyers Naturhist. Tidsskrift. Kjobenhavn. 12 Teile mit 88 Taf., 1862-1883.) j. Embryonic stages Heymons, Richard. Grundziige der Entwicklung und des Korpersbaues vonOdonaten und Ephemeriden. (Anhang zu den Abhandl. K. Akad. Berlin, 1896, p. 22, 2 Taf. See Figs. 5, 29.) Entwicklungsgeschichtliche Untersuchungen an Lppisma saccharina L. (Zeitschr. f. wissens. Zoologie, Ixii, 1897, p. 595, 2 Taf. See Fig. 10.) TEXT-BOOK OF ENTOMOLOGY THE THORAX AND ITS APPENDAGESa. The thorax; it3 external anatomy The middle region of the body is called the thorax, and in generalconsists of three segments, which are respectively named the protho-rax, mesothorax, and metathorax (Figs. 88, 89, 98).. FIG. 88. — External anatomy otJHelanoplun xjiretun, thi- head and thorax disjointed. The thorax contains the muscles of flight and those of the legs,besides the fore intestine (oesophagus and proventriculus), as well as,in the winged insects, the salivary glands. EXTERNAL ANATOMY OF THE THORAX 87 3O In the more gener-alized orders, notablythe Orthoptera, thethree segments aredistinct and readilyidentified. Each segment con-sists of the tergum,pleurum, and the prothorax thesepieces are not sub-divided, except thepleural; in such casethe tergum is calledthe pronotum. Theprothorax is verylarge in the Orthop-tera and other gener-alized forms, as alsoin the Coleoptera, butsmall and reduced inthe Diptera and Hy-menoptera. In thewinged forms thetergum of the meso-thorax is di
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
