New species of Megastylus (Hymenoptera: Ichneumonidae: Orthocentrinae) reared from larvae of Keroplatidae fungus gnats (Diptera) in a Dutch orchid greenhouse

A new parasitoid wasp species belonging to the genus Megastylus (Hymenoptera: Ichneumonidae: Orthocentrinae) found in an orchid nursery in The Netherlands is described and illustrated: Megastylus woelkei sp. nov. It was reared from parasitized larvae of fungus gnats (Diptera: Keroplatidae). The biology of this new species and the possibility to use it in biological pest control are briefly discussed. http://zoobank.org/urn:lsid:zoobank.org:pub:7E405813-67C6-44CD-B068-97B79523592E