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 . FIG. 193.— Development of the sting in Bombus : A, a, 1st pair on Sth sternite ; b, 2d innerpair forming the darts ; c. outer pair. B-E, more advanced stages. F, a1, y, e, three pairs oftubercles, the germs of the male organs. 174 TEXT-BOOK OF ENTOMOLOGY see by E, Fig. 195; and along with these the darts are also prolonged upward,still held to the guides by the grooved arrangement before explai
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 . FIG. 193.— Development of the sting in Bombus : A, a, 1st pair on Sth sternite ; b, 2d innerpair forming the darts ; c. outer pair. B-E, more advanced stages. F, a1, y, e, three pairs oftubercles, the germs of the male organs. 174 TEXT-BOOK OF ENTOMOLOGY see by E, Fig. 195; and along with these the darts are also prolonged upward,still held to the guides by the grooved arrangement before explained ; but bothguides and darts, in the upper part of their length, curve from each other some-what like the arms of a Y, to the points c, c (A, Fig. 194), where the darts. Kic. 194. — Stinj; of bee x Ho times: A, sting- separated from Its muscles; JIH, poison sac ; jiy. poison jfkind ; illi (/, .tli abdominal iraii^rlinn : n, H, nerves; c, external thin membrane joiningstiiifr to last iihdoininul segment ; /. /, /. :in<l /, X1, /. levers to move the darts; *//. sheath; /,vulva : ji, stin^r-pul]ius or leeler, with tactile hairs and nerves. Ji and (. seetions through the dartsand sheatli, x :ioo times: x/i. shealli: . end of a dart,x Jini: , <;. opi-iiiiif,s for poison to escape into the wound. — After Cheshire. THE STRUCTURE OF THE BEES STING 175 make attachment to two levers (?, *). The levers (k, I and k, Z) are providedwith broad muscles, which terminate by attachment to the lower segments ofthe abdomen. These, by contraction, revolve the levers aforesaid round thepoints /, /, so that, without relative movement of rod and groove, the points
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
