Todd,
Those are mites. It’d take a lot of effort to identify those mites, however.
-Rich


Richard J. Pollack, PhD
HARVARD UNIVERSITY
Environmental Health and Safety (EH&S)
Senior Environmental Public Health Officer
46 Blackstone St.
Cambridge, MA 02139
Office: 617-495-2995  Cell: 617-447-0763
www.ehs.harvard.edu
[email protected]<mailto:[email protected]>




From: [email protected] [mailto:[email protected]] On Behalf Of 
Todd Holmberg
Sent: Wednesday, August 29, 2018 12:41 PM
To: [email protected]
Subject: [pestlist] Mystery

Hello Pestlist,

Today while checking a sticky trap, I saw a ground beetle next to a bunch of 
frass, and something that looked like potentially a dermestid larva.  I put it 
under the microscope, and saw that it was a dermestid larva, and there were 
also a bunch of these super small critters under/around the ground beetle.  At 
first, I thought they were booklice, but they don't seem to have a 
"booklice-like head".  Sorry about the picture quality.  They are SUPER small, 
and this was as close as the microscope could get without getting stuck on the 
trap.

Does anyone have a guess as to what they might be?  I have heard people say 
that sometimes eggs will "hatch out of" insects that are stuck on traps- is 
that true?

My guess is the ground beetle was stuck there for 1-2 weeks.

If anyone has any thoughts, they would be appreciated.

Thanks,
Todd
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