Figures 10.4


Dorsal (left) and ventral (right) views of the larva of Edwardsina polymorpha (Diptera: Blephariceridae); the venter has suckers which the larva uses to adhere to rock surfaces in fast-flowing water.
Figures 10.4. Dorsal (left) and ventral (right) views of the larva of Edwardsina polymorpha (Diptera: Blephariceridae); the venter has suckers which the larva uses to adhere to rock surfaces in fast-flowing water.
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  A male water beetle of Dytiscus (Coleoptera: Dytiscidae) replenishing its store of air at the water surface.
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  Dorsal and lateral views of the larva of a species of water penny (Coleoptera: Psephenidae).