Date of this Version
This NebGuide discusses the importance, life history and control of boxelder bugs.
Boxelder bug adults are about 1/2 inch long. They are slate-gray with three red lines behind the head and red lines on the wings. The rear half of the wings have a reddish margin and the abdomen under the wings is also red. Nymphs (young bugs) are bright red with darker heads. They resemble adults, but their wings do not fully develop until they reach maturity.