The major workers generally have phragmotic heads that are truncate to varying extents.

[5] Workers in the Colobopsis cylindrica group have greatly developed mandibular glands that extend from the head all the way to the end of the gaster.

[4] Colobopsis make their nests in plant material such as wood, galls and dead branches.

To allow nestmates to pass, the soldier/queen moves back into the nest tunnel, which widens immediately past the entrance.

[5] Workers in the Colobopsis cylindrica group have the ability to burst the gaster, releasing mandibular gland compounds from the head (autothysis).