Synopsis The lucidly written text combines both the taxonomy and biology of parasitic Hymenoptera along with their use in biological control of insect pests. The book has a biosystematic approach and stresses on the potential use of these parasitoids against insect pests. Written in an easily understandable style the author has successfully attempted the different aspects of biosystematics of parasitic Hymenoptera which would be of great interest not only to students of entomology, agricultural entomology and zoology but also to applied entomologists and research workers.