Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Information about the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

beetle - Hydrobius melaenus

beetle - Hydrobius melaenus
4 miles east of Ithaca, Tompkins County, New York, USA
June 12, 2005
Came to light at night. Approximately the size of Harmonia axyridis (didn't measure...).

Images of this individual: tag all
beetle - Hydrobius melaenus beetle - Hydrobius melaenus

Moved from Enochrus.

My suspicion
would be Hydrobius melaenus if about 8 mm.

H. melaenus
It was about 8mm, from what I remember. Is there any other view/closeup that would make this more certain? I'll move the images to a new species page for now.

is another species it might be, supposedly around but I have never taken it. To be sure you must have a crystal-clear view of the surface of the metafemora in a ventral view. H. melaenus is associated with running water, the other with ponds. Your specimen was taken at light, so nothing would be obvious, except I have taken melaenus a number of times and the other never.


I'm thinking this is a water scavenger beetle, but I'm going mostly by the "Gestalt" method of ID:-) Very nice image, and a real expert will have plenty of clues to work with!

Thanks Eric -- that looks right.

Enochrus sp.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.