Microgastrinae Wasps of the World
from the home page: "This site shares information about the world species of Microgastrinae parasitoid waps (Hymenoptera: Braconidae). There are over 3,000 described species of microgastrines, and an additional 20,000-40,000 remain undescribed, making this group one of the most diverse among parasitoid wasps. Microgastrines can be found in all major terrestrial ecosystems, from as north as 82°30' N in the Canadian Arctic (Alert, Ellesmere Island) to as south as 55° S in South America (Tierra del Fuego, Argentina and Chile) and 50° S in New Zealand (the subantarctic Auckland Islands). They have also been collected up to at least 4,000 meters of altitude (in the Andes and the Himalayas). These wasps parasitize caterpillars of moths and butterflies (Lepidoptera), and thus are one of the most important groups in the biological control of agriculture and forestry pests.