tegula

from The Collaborative International Dictionary of English v.0.48

Tegula \Teg"u*la\, n.; pl. {Tegulae}. [L., a tile, dim. fr.
   tegere to cover.] (Zool.)
   A small appendage situated above the base of the wings of
   Hymenoptera and attached to the mesonotum.
   [1913 Webster]