any of more than 15,000 species of parasitic wasps (order Hymenoptera) that are dark or dull in colour and relatively small, seldom exceeding 1.5 cm ... Found on http://www.britannica.com/eb/a-z/b/104
any of numerous wasps of the family Braconidae, the larvae of which are parasitic on aphids and on the larvae of moths, butterflies, beetles, etc. Found on https://www.infoplease.com/dictionary/braconid