Megastylus Schiødte, 1838

Andrei E. Humala, H. Marjolein Kruidhof & Jozef B. Woelke, 2017, New species of Megastylus (Hymenoptera: Ichneumonidae: Orthocentrinae) reared from larvae of Keroplatidae fungus gnats (Diptera) in a Dutch orchid greenhouse, Journal of Natural History 51 (1), pp. 82-95 : 85

Genus Megastylus Schiødte, 1838

Type species Megastylus cruentator Schiødte, 1838

Diagnosis

The genus Megastylus can be easily separated from other congeners by the following characteristics: presence of large ovoid scape considerably inflated and obliquely truncate about 50° from transverse; long antennae and legs; absence of areolet in the fore wing of all described species; thin and short ovipositor hardly surpassing metasoma; first segment of metasoma fairly long and almost straight; basal flagellomere two or three times as long as following ones. As a rule, female flagellum is covered with long setae; tyloids on male flagellomeres are lacking.