Wheat sawfly \Wheat sawfly\
(a) A small European sawfly ({Cephus pygmaeus}) whose larva
does great injury to wheat by boring in the stalks.
(b) Any of several small American sawflies of the genus
{Dolerus}, as {Dolerus sericeus} and {Dolerus arvensis},
whose larvae injure the stems or heads of wheat.
(c) {Pachynematus extensicornis}, whose larvae feed chiefly
on the blades of wheat; -- called also {grass sawfly}.
[Webster 1913 Suppl.]