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Photo#152503
What type of water beetle - Dytiscus hybridus - male

What type of water beetle - Dytiscus hybridus - Male
wabeno, oconto County, Wisconsin, USA
October 17, 2007
we found this outside in a puddle, and was wondering what type of beetle this would be.

Images of this individual: tag all
What type of water beetle - Dytiscus hybridus - male What type of water beetle - Dytiscus hybridus - male

from Claude Tessier:
"The only specie that has all the features shown is Dytiscus hybridus: anterior leg yellow, mesofemur yellow, all others piceous; pronotum laterally broadly bordered with yellow. I do not have this specie in my collection. My observations are from Larson et al. (2000). It cannot be marginicollis or hatchi for sure (not in Wisconsin)."

Moved from Dytiscus.

Male.
I agree this is a species of Dytiscus, and it is a male. Males have those greatly dilated front tarsi, almost disk-like in appearance, that they use to grip the female during mating.