Author of genus is
Fabricius, 1775.
The Century Dictionary (1) gives orign as New Latin, said to be from Greek
skolos, a pointed stake, a thorn, prickle. More directly perhaps, from the related Greek word
skolios, meaning bent, crooked, slanting, oblique (
The Century Dictionary and Internet searches of various medical dictionaries). Compare
scoliosis, curvature of the spine. These wasps have a notably curved posture, and that is likely the origin of the name.