pentamera

from The Century Dictionary.

• A group of Coleoptera, containing; those families of beetles all the tarsi of which are five-jointed (with some anomalous exceptions).
• A prime division of the hymenopterous family Chalcididæ, comprising 13 subfamilies, in which the tarsi are five-jointed.

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

• noun plural (Zoöl.) An extensive division of Coleoptera, including those that normally have five-jointed tarsi. It embraces about half of all the known species of the Coleoptera.