Riffle Beetle Larva

• Up to 3/4" long
• Body is long, hard, stiff and segmented
• Six long segmented legs on upper middle section of body
• Back end has two tiny hooks and short hairs (may be hard to see)

Riffle Beetle Adult

• Adults are considered better indicators of water quality than larvae because they have been subjected to water quality conditions over a longer period
• Walks very slowly under the water
• Does not swim on the surface

• Small oval body
• 1/4" long
• One pair of tiny antennae

• antennae
• larva (larvae)
• oval
• segmented