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''Acilius mediatus'' is a species of 
This species lives in creeks, ponds and ditches, occasionally with silt-laden streams, and are best seen during spring and summer. Prey is composed of other aquatic arthropods they can tackle. Males have expanded front feet with clumps of hairs used to grab hold of a female for mating.
predaceous diving beetle
The Dytiscidae – based on the Greek ''dytikos'' (δυτικός), "able to dive" – are the predaceous diving beetles, a Family (biology), family of water beetles. They occur in virtually any freshwater habitat around the world, but a ...
in the family Dytiscidae. It is found in North America.
This species lives in creeks, ponds and ditches, occasionally with silt-laden streams, and are best seen during spring and summer. Prey is composed of other aquatic arthropods they can tackle. Males have expanded front feet with clumps of hairs used to grab hold of a female for mating.
References
Further reading
* * * * * * * Dytiscidae Beetles described in 1823 Beetles of North America {{dytiscidae-stub