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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Water Scavenger Beetles (Hydrophilidae) » Hydrophilinae » Berosini » Berosus
Photo#16948
Berosus sp., family Hydrophilidae - Berosus
Copyright © 2005 Jim McClarin

Berosus sp., family Hydrophilidae - Berosus
Londonderry, HillsboroughRockingham County, New Hampshire, USA
May 15, 2004
Size: 5 - 7 mm?
This little guy was one of the noisiest beetles I've encountered, squawking frantically whenever I tried to pick him up.

Images of this individual: tag all
Berosus sp., family Hydrophilidae - Berosus Berosus sp., family Hydrophilidae - Berosus
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Contributed by Jim McClarin on 11 May, 2005 - 4:59am
Last updated 8 September, 2005 - 5:37pm

Berosus
It is indeed in the genus Berosus...likely B. sayi or another of the 'larger' species. Not sure if by 'toes' you mean the long swimming hairs on the tarsi...these are very good swimmers.
… Andrew Short, 29 May, 2005 - 10:03am login or register to post comments

 
Thanks for the ID!
Yes. I realize there are plenty of first-timers using this site who know nothing about insect anatomy, so I am periodically tempted to use terms that will be immediately understandable to them, even if incorrect. (How's that for spinning the fact I couldn't think of the proper term?)
… Jim McClarin, 29 May, 2005 - 11:14am login or register to post comments

Hydrophilidae.
Good job on the family ID! This might be a species of Berosus, which are indeed noted for their ability to "stridulate" (make noise by rubbing one body part against another) to communicate.
… Eric R. Eaton, 12 May, 2005 - 4:11pm login or register to post comments

 
Much obliged
This specimen compares with none in Dillons. The extremely long "toes" are the principal trait I'm not seeing there, but nothing else lines up exactly either.
… Jim McClarin, 12 May, 2005 - 6:58pm login or register to post comments

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