heterogyna

from The Century Dictionary.

• In Latreille's system of classification, the first family of aculeate hymenopterous insects, the ants: so called from the two or three kinds of individuals, as males, females, and neuters: nearly equivalent to the modern families Formicidæ, Dorylidæ, Poneridæ, Myrmicidæ, Odontomachidæ, and Mutillidæ.
• A group of fossorial hymenopterous insects, or digger-wasps, consisting of the families Mutillidæ and Scoliidæ, thus together contrasted with Fossores proper.