From ZooTerms (Dictionary of Invertebrate Zoology)
forehead; face.front (noun; Latin frons, fore part of anything, face): 1. The
3. (Arthropoda: Insecta) a. That portion of a cranium between the antennae, eyes, and ocelli; the frons. b. In ants, the facial area above the clypeus between the frontal carinae; dorsally it passes without definite boundary into the vertex.