31. Despite this, it is not known if " M . nigriceps " is mandibles and clypeus are also yellow. 32. In most species, though, the frons is bordered at its anterior by the frontoclypeal or epistomal sulcus above the clypeus . 33. Unlike the other species, it has only one central hair on the front of its clypeus and its propodeum is rounded. 34. The protruding clypeus is large and has a roughly pentagonal shape and two pairs of long fine trigger hairs on the ventral side. 35. {{ quote | " [ Female ] Black face has a sooty black pubescence, clypeus anteriorly broadly emarginate; mandibles ferruginous. 36. The clypeus is a sclerite between the face and labrum, which is dorsally separated from the frons by the frontoclypeal suture in primitive insects. 37. The labrum is a simple, fused sclerite, often called the upper lip, and moves longitudinally, which is hinged to the clypeus . 38. There is no median seta on the anterior margin of the clypeus , but rather a series of evenly spaced setae along the entire margin. 39. These are their oval head, rounded clypeus , prominent frontal lobes and in most species, a strongly developed propodeal spine with two large nodes. 40. For that he won his " agnomen " and since then introduced the " Clypeus Macedoniccus " in his family's medals.
