. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. I STRlT-rrRE, âWTII AN.) FCCNOMICS âf ,NSK. TS "0 aWmrx Ma) ih. .lies have .he iââer plau-s uâ| .â â,,,â llu. c^« channel .he f.,rm a ,, while .he lower ha .e rate c,tee, and are wie . hke a .aw, making in leaf or s,em ;r the » "I 'WO kinds, one alkaline the "I'l, and is secreted l.
. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. I STRlT-rrRE, âWTII AN.) FCCNOMICS âf ,NSK. TS "0 aWmrx Ma) ih. .lies have .he iââer plau-s uâ| .â â,,,â llu. c^« channel .he f.,rm a ,, while .he lower ha .e rate c,tee, and are wie . hke a .aw, making in leaf or s,em ;r the » "I 'WO kinds, one alkaline the "I'l, and is secreted glanrls .he alxlomen. .i INTERNAL ANATOMY. The internal anatomy of an inscc. maj' lie discussed undar the following heads: («) muscular system; (4) resi)iratory system- ir) circulatory system; (rf) intestinal or digestive system; (e) nervous svstem (/) reproductive system (Fig. 25). (a) Muscular Syslem.âThc mu^Luur system of insects is well developed. The muscles are attached .0 the inner surfaces "f the exoskeleton. In the abdomen the arrangement of j the muscles is the same in each segment, f,.,. .ââand ...is, except at the extremity where special mus- â¢'â¢i'i>a'-''ius uf hcney bec''"'o7 cles exist for moving the , the ^;";:Zâ"'Xn,,';''t^r^ lerti or other terminal organs. In the ^'"''- 'â¢â¢ ^'i"« <.Wr Aâ¢^- sternum of each abdominal segment there '"''"* chain"' tV⢠^â¢^'''"f "'"^""'''"^' ""'^'^^ °" '^-^^ «ide of the nerve ham. These are the longUudinal sternah or venlml recti (Fig. 2b) In the tergum also similar set., of muscles occur on each side of the . Wrsal vessel; these are the longUudinal tergals or dorsal recti. Betwe. hese ongitudinal muscles and the integument are numerous,.W,Vâeand trans- 2^ muscles, and these, with the longitudinal muscles, brLg about .he nerh 17''"?''""' " '^'&
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectentomology, bookyear1
