Antennal insertions situated far from posterior margin of clypeus. The labrum is found below the clypeus. One can distinguish between the two sexes by looking at the ridges on the clypeus. The adults have a long rostrum formed from the clypeus and labrum, genae, and maxillo-labium. Additionally, there is often a black band in the lower half of the clypeus. The clypeus, located below the frons, lies between the two antennae. The dorsal margin of the clypeus is below the antennal sockets. Numerous shields were used by the Roman soldiers, such as the "pelta", "parma" and "clypeus". Oolite Marl, Upper Trigonia Grit and Clypeus Grit are in the succession. For example, in dragonflies and damselflies, it is between the compound eyes, clypeus, and mouthparts. The mandibles of "O. bauri" are kept in place with a latch called the clypeus. In addition, "S. cyanea" has a red clypeus. They have a gray-white tuft of hair on their faces, including on the clypeus. The antennae are attached low on the face, on the dorsal margin of clypeus. The mandibles bracket the labrum, but do not touch the clypeus.