Fire-colored beetle larvae live in moist locations under the bark of old logs or under the logs. They appear to feed on fungi. At the tail end, they have a hard, two-spined segment that looks like the pincers of earwigs, but cannot pinch because the segment is all one piece. The larvae often raise the tail end as if in threat. The spines are called urogomphi.

Adult Fire-colored beetles fly at night and can be attracted to lights. Dendroides ephemeroides photos on bugguide