Black beetles inside

Asked July 9, 2018, 2:50 PM EDT

Im looking for information on these beetles. We are being bombarded by these stupid things. Bottle shown for size. The second picture is super zoom. They fly and are medium speed (not fast like a house fly), and have a hard beetle shell. We installed a wall ac unit and there were some holes I missed. We got them sealed and no more mosquitoes or moths etc. But these guys remain. I killed about 40 of them in 10min last night. Anything I can do to deter or mass exterminate? They are only in our bedroom so far. Any help appreciated!

Hennepin County Minnesota

2 Responses

Although the picture is blurry, these appear to be black carpet beetles. See the following websites for more information on controlling them. 1. http://ipm.ucanr.edu/PMG/PESTNOTES/pn7436.html 2. https://extension.umd.edu/hgic/carpet-beetles 3. http://extension.colostate.edu/topic-areas/insects/carpet-beetles-5-549/

The very shiny look and relatively long antennae are not characteristic of black carpet beetles. In my experience, the carpet beetles rarely fly. I think this is some sort of leaf beetle, family Chrysomelidae. They are probably coming from a host plant near to the area. Unfortunately, a more detailed identification would be needed to figure out the likely host plants.