Note 34 — PART I.—MORPHOLOGY AND PHYSIOLOGY (continued 4)

Von Lendenfeld, however, points out the fact that Straus-Durckheim proved that the wings of beetles are moved by a complicated system of numerous muscles. “In the Lepidoptera I have never found less than six muscles to each wing, as also in the Hymenoptera and Diptera.” “The motions of the wings of Libellulidæ are the combined working of numerous muscles and cords, and of a great number of chitinous pieces connected by joints.”