A, Front; B, side; C, back; v, vertex; f, frons; cl, clypeus; lbr, labrum; oc, compound eye; ge, gena; mn, mandible; ca, st, pa, ga, la, cardo, stipes, palp, galea, lacinia of first maxilla; sm, m, pa', pg, submentum, mentum, palp, galea of 2nd maxilla.
Along the straight edge there is usually a broad band, and at the neck is attached the "hood" (in Latin, the clypeus or shield), i.e.
Below this comes the front, and then the face or clypeus, to which a very distinct upper lip (labrum) is usually jointed.
Ia, frons; b, clypeus (the pointed labrum beneath it); II, mandible; III, first maxilla; (a, base; b, sheath; c, piercer), III', inner view of sheath; IV, second maxillae forming rostrum (b, mentum; c, ligula).
The head is extended from behind forwards, so that the crown (epicranium) is large, while the face (clypeus) is small.