The anterior portion of the insect head bounded in front by the clypeus.
The area of the head below the arms of the epicranial suture and above the epistomal suture. It bears the median ocellus.
front of head, essentially face.
(or frontal triangle): Triangular plate on the front of the head that lies above the clypeus (see Figure 3).
In Lepidoptera, that area of the head anterior to the antennae and above the anterior tentorial pits, or more generally, that portion of the ‘face' visible in an anterior view.
The area of the head between the ventral margin of the toruli and the anterior margin of the median ocellus. (note: this is equivalent to the true frons of the larvae).
Frons (singular) is the term used to describe the frontal area of an insect's head. The head of the insect, wich normally is not even in a "Frons" position, is only in that position when an insect is confused. Not all insects have a "frons".