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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Tenebrionoidea » Ironclad Beetles (Zopheridae) » Cylindrical Bark Beetles (Colydiinae) » Synchitini » Bitoma » Bitoma quadriguttata
Photo#266507
Cylindrical bark beetle - Bitoma quadriguttata
Copyright © 2009 WonGun Kim

Cylindrical bark beetle - Bitoma quadriguttata
Chantilly, Fairfax County, Virginia, USA
April 16, 2009
Size: ~ 3 mm
Found under the bark of a dead tree. My best guess is Bitoma quadriguttata.
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Contributed by WonGun Kim on 16 April, 2009 - 7:03pm

correct
As long as it has the markings it is unambiguously quadriguttata. If it had lacked the markings, it would take a little more careful inspection.
… Rick Buss, 16 April, 2009 - 7:31pm login or register to post comments

 
Thanks Rick!
If I find a markingless specimen, which part should I focus on in taking photos?
… WonGun Kim, 16 April, 2009 - 9:00pm login or register to post comments

 
ventral view maybe
I often use Karl Stephan's guide to Colydiids which is available on the web. Sometimes B. quadriguttata is all dark or all red and looks like several others from the same range. Stephan used the eye size and ventral eye separation to distinguish them. I always have the specimen in hand so am not sure how well this would work from a photo of the underside.
… Rick Buss, 16 April, 2009 - 9:47pm login or register to post comments

 
Thanks!
I'll try it if I have a chance.
… WonGun Kim, 16 April, 2009 - 10:00pm login or register to post comments

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