Spraying these insects with soapy water will kill them but this is usually not practical. Insecticides work well for keeping numbers down on a more permanent basis. Sealing all cracks and holes on houses can help keep them from invading the living area. Some houses can be completely engulfed in these annoying bugs in the summer
This insect is a pest of boxelder trees which is how they got the name. Boxelders used to only inhabit the western portion of the U.S. but have now spread all over. They usually congregate on the warm sides of houses in the spring and summer. In winter, they will over winter in attics, wall voids, and warm areas of homes. Adults are black and red, younger boxelders are completely red.