Scarab-beetle-control
Guides
Myzinum carolinianum
Myzinum carolinianum is a thynnid wasp species native to North America. Like other members of its genus, it is a parasitoid of scarab beetle grubs, particularly those in the genus Phyllophaga. The species exhibits extreme sexual dimorphism: males are slender with long, straight antennae and a prominent curved pseudostinger (external genitalia), while females are larger-bodied with robust abdomens, stouter legs adapted for digging, and short, coiled antennae. Adults are active in late summer and autumn, frequently visiting flowers such as goldenrod and thoroughwort.