tetramera

from The Century Dictionary.

• In entomology: In Latreille's system, a division of Coleoptera, containing those beetles all of whose tarsi are usually or apparently tetramerous or four-jointed. Also called Cryptopentamera and Pseudotetramera.
• A prime division of the hymenopterous family Chalcididæ, comprising six subfamilies in which the tarsi are four-jointed.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A division of Coleoptera having, apparently, only four tarsal joints, one joint being rudimentary.