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Photo#1031657
Terrarium Moss Garden Beetles - Simplocaria semistriata

Terrarium Moss Garden Beetles - Simplocaria semistriata
Dover, New Hampshire, USA
Size: 3mm
It has been just over two weeks since I posted the ID request for these cute little guys: http://bugguide.net/node/view/1028468

The larvae have since disappeared from my terrariums and now I am seeing several of these little beetles. Up close, their shells are shiny with a hint of white or yellowish hairs near the back of the shell. They react quickly to play dead, and remain in a closed state for a few minutes before getting the courage to open up. Is this an adult leaf beetle? I didn't expect it to stay so small! Do I need to worry about having these in my terrariums, will they pose any infestation problem?

Thanks for your time and advice!
Nate

Moved tentatively; looks like the adventive S. semistriata
next time please make sure to crop images tight like i did here for you and crop off the ruler before posting

Moved from ID Request.

Featherwing Beetle?
http://bugguide.net/node/view/385050
Am I in the right neighborhood? Thanks! :)

 
not related; this is a Simplocaria
not a slightest concern

 
Simpolcaria semistriata
This insect is known to feed, mate, and oviposit on mats of the moss Dicranella heteromalla in North America. It is an invasive species from Europe where it feeds on Mnium hornum. It is selective in its food, avoiding the moss Atrichum angustatum when it is intermixed with the Dicranella. See Johnson 1990.

Johnson, P. J. 1990. Notes on the naturalization of two species of European Byrrhidae (Coleoptera) in North America. J. N. Y. Entomol. Soc. 98: 434-440.

 
Thanks! I'll be sure to pull
Thanks! I'll be sure to pull in a closer crop next time! Do you think these are the adults of the larval stage I posted a few weeks ago? http://bugguide.net/node/view/1028469#1817966

 
the two don't look related to me at all

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