Final answer:
The lines 'And the suitors mad with fear at her great sign stampeded like stung cattle by a river when the dread shimmering gadfly strikes in summer' contain an epic/Homeric simile (III) and imagery (II).
Step-by-step explanation:
The lines 'And the suitors mad with fear at her great sign stampeded like stung cattle by a river when the dread shimmering gadfly strikes in summer' contain the literary device of an epic/Homeric simile (III) and imagery (II). An epic or Homeric simile is a lengthy and elaborate comparison that adds depth and vividness to the description. The simile in these lines compares the suitors' fear and hurried movements to the scattered and frantic behavior of stung cattle by a river. This comparison highlights the chaos and panic caused by the sign and emphasizes the suitors' fear. The lines also contain imagery, as they paint a vivid picture of the suitors' reactions and create a sensory experience for the reader.