Subject: Mystery beetle in our house
Location: Seattle, WA
March 21, 2016 10:35 pm
I am hoping you can help identify these black orange beetles that suddenly appeared in our house. We’re not sure who they are or where they came from. They appeared recently (March) and can be found on walls, furniture, or ceilings. Thank you!
PS> the one in the photo got squished a little during the capture
We believe we have correctly identified your Checkered Beetle as Enoclerus cupressi based on this BugGuide image. The genus page on BugGuide states the habitat is “Woodland; found under bark, in galls, around woody plants, rarely on foliage” and the food is “Both larvae and adults are generally predacious. Some adults feed on pollen, some species are attracted to carrion and ‘stored animal products.'” Since you have found numbers of them in your home, we suspect they may be feeding on a dead animal in the walls or perhaps some “stored animal products” are the cause of their appearance. The Checkered Beetles are not a problem, but their presence may be a symptom of something that may need attention.