THYSANOPTERA (Oiaavos, a fringe, and 7rTepbv, a wing), a term used in zoological classification for a small order of the class Hexapoda.
In their life-history the Thysanoptera belong to the Exopterygote division of the Hexapoda (q.v.).
Its condition thus recalls the pupal instar of the higher (Endopterygote) Hexapoda; and the Thysanoptera, though few in number, are seen to be of great interest to the student, exhibiting at once a transition between the biting and the suctorial mouth, and the passage from " incomplete " to " complete " metamorphosis.
The internal structure of the Thysanoptera has been studied by (After H.
Tion of the nervous system and in the a, Anterior; b, pof presence of four Malpighian (excretory) terior process of tubes the Thysanoptera resemble the ovipositor.