[5] The Megischus genus can be distinguished from other genera in Stephanidae by transversely depressed hind tibia and the absence of setae on the M+Cu1 vein.

Due to their specialized parasitic lifestyle, Megischus plays a critical role in regulating the wood-boring beetle population, which can be pests for species of hardwood trees and other vegetation worldwide.

[9] The Megischus genus can be distinguished from other genera in Stephanidae by transversely depressed hind tibia and the absence of setae on the M+Cu1 vein.

Adults are typically a black or brown color and can range from approximately 10–30 mm long depending on the species (and excluding the ovipositor), with males slightly larger than females in size.

[6] Megischus are ectoparasitoids that play a critical role in regulating the wood-boring beetle population, which can be pests for species of hardwood trees and other vegetation worldwide.