frons

noun3

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. — 1981
3. •
   (of Diptera) The postfrons.

   • In most blondeliines (and in most Tachinidae in general), males have a narrower frons than conspecific females […] — 1985