1) Cynipid gall wasp 2) Cynipid wasp 3) Gall wasp 4) Wasp 
• (n.) An insect that deposits its eggs in plants, and occasions galls, esp. any small hymenopteran of the genus Cynips and allied genera. See Illust. of Gall.
Gall'fly` noun ; plural Gallflies (Zoology) An insect that deposits its eggs in plants, and occasions galls, esp. any small hymenopteran of the genus Cynips and allied genera. See Illust. of Gall . 
[n] - any of various insects that deposit their eggs in plants causing galls in which the larvae feed
noun any of various insects that deposit their eggs in plants causing galls in which the larvae feed