The scape, labrum, mandibles and palpi ferruginous; the clypeus widely emarginate anteriorly.
Fabricius has denominated this part the clypeus, in which he has been followed by most modern Entomologists.
Ferruginous, with the abdomen black; the anterior margin of the clypeus rounded.
On the abdomen of all the specimens, and on the clypeus of one of them, grew a fungus wholly unlike the surrounding mould.
The labrum, or upper lip, is separated by a deep suture from the clypeus, and is trapezoidal in form.
Bright red; the anterior margin of the clypeus with a minute tooth in the centre; the tips of the mandibles fuscous.
It is known that the temperature of the laconicum was regulated by drawing up or down a metallic plate or clypeus.
Mystacine -us: bcarded: with a hairy fringe above mouth or on clypeus.
Black; the clypeus angular in front, its anterior margin and a spot on the mandibles yellow; the antennæ rufo-testaceous beneath.
Post-epistoma: that part of the head behind the clypeus in Hymenoptera: see also post-clypeus.