Meteorinae
Meteorinae is a subfamily of braconid parasitoid wasps. Several species have been used in biological control programs. The name for this group comes from the pupal stage, which, in species attacking Lepidopteran hosts, hangs suspended from a long thread of silk. Description and distribution. Meteorines are characterized by an open 1st subdiscal cell and a four-sided 2nd subdiscal cell of the forwings. They have a distinctive petiolate waist. They are found worldwide, in habitats where their hosts can be found. Biology. Meteorines are koinobiont endoparasitiods of Coleoptera or Lepidoptera larvae. Some species are known to have broad host  ranges, meaning they can attack many species of hosts. Most are solitary, laying a single egg per host, but some are gregarious and many larvae develop within a single host. Many species are nocturnal as adults. Genera. Two genera are found in North America, "Meteorus" and "Zele". Recent evidence suggests that "Meteorus" may be paraphyletic with respect to "Zele", but synonymyzing the two genera could potentially cause great confusion in the scientific literature. Use in biological control. Many hosts of Meteorines are considered pests, especially of forests, making them good candidates for biocontol projects. "Meteorus pulchricornus" has been imported to  North America on multiple occasions to attempt to control the gypsy moth. "M. vesicolor" was introduced to the United States in the early 1900s for the control of the brown-tail moth. "M. trachynotus" was investigated for control of spruce budworm as was "M. hypophloei" for controlling bark beetles. Other species have been used in control of cutworms, avocado looper, and swallowtail pests on citrus crops.