Landmark | Description |
---|---|
1 | Anterior border of the anteclypeus in the medial region |
2 | Apex of the anterior border of the gena |
3 | Transverse imaginary line cutting through the head at the level of the base of the antennal tubercle, landmark in the median region of the head |
4 | Anterior border of the eye |
5 | Anterior border of the ocellus |
6 | Posterior border of the ocellus |
7 | Posterior border of the eye |