encyrtinæ

from The Century Dictionary.

• A subfamily of the parasitic hymenopterous insects of the family Chalcididæ.
• They are distinguished by a compact form, the absence of parapsidal sutures, a short marginal vein on the fore wings, a sharp occipital ridge, and a large mesotibial spur. The group contains chiefly species of small size and great activity, parasitic in the main upon bark-lice and lepidopterous larvæ, though occasionally infesting other insects.