Parasitoid
In Britain there are about 6500 species of Hymenoptera  more than in any other insect order  and just one parasitoid superfamily, the Ichneumonoidea, has nearly half of them. Most workers now recognise only two families in Ichneumonoidea. These are Ichneumonidae, with over two thousand British species, and Braconidae, with nearly 1200 representatives in Britain. They are, respectively, the largest and the second largest families of British insects. Only a beetle family, the Staphylinidae, is near the thousand mark. Ichneumonoids also include the largest parasitoids.