Subject: Bugs on bugs.
Geographic location of the bug: Vernon, British Columbia, Canada
Time: 12:39 PM EDT
Upon taking some photographs of a Granulated Carabid, I noticed that there was a smaller individual on the subject. Locating several other Carabids in the area, it was found that several individuals had these unknown hitchhikers, with numbers ranging between 0 and 4.
How you want your letter signed: Scott
The creature you found on this Granulated Carabid is a Mite, and there are phoretic or hitchhiking mites that use beetles as a means of transportation. Phoretic Mites are commonly found on Sexton Beetles in great numbers and the Mites take advantage of the flying Sexton Beetles to transport them to new locations to find food. We know of no instances of phoretic Mites using Ground Beetles for transportation, so it is entirely possible that this particular Mite might have a more ominous reason for being on the Granulated Carabid you found. Ground Beetle Macro Photography has an example of a Mite found on a Ground Beetle but there is no explanation. This might be a phoretic Mite, but we haven’t the expertise with Mites to be certain.