Figures 13.4

Figures 13.4. Ventrolateral view of the head of a dragonfly nymph (Odonata: Aeshnidae: Aeshna) showing the labial “mask”:
(a) in folded position, and (b) extended during prey capture with opposing hooks of the palpal lobes forming claw-like pincers. (After Wigglesworth 1964)