frons

noun

1. In vertebrates, especially mammals, the forehead; the part of the cranium between the orbits and the vertex.
2. The front part of the epicranium or head capsule of many insects; generally speaking, the area below or between the antennae and above the clypeus. Typically it lies between the genal or "cheek" areas on either side of the head.

   “In a generalized insect the frons extends from the vertex to the frontoclypeal (epistomal) suture, between the two anterior tentorial pits.”

3. (of Diptera) The postfrons.

   “In most blondeliines (and in most Tachinidae in general), males have a narrower frons than conspecific females […]”