Utah State University Extension
The bumble flower beetle (BFB) is a common member of the Scarabaeidae (scarab) beetle family. Its common name originated because adult BFB’s often fly close to the ground and emit a loud buzzing sound similar to that of a bumble bee. Larvae (grubs) and adults are often found in or near fermenting and/or decomposing organic matter.
Beddes, Taun and Davis, Ryan S., "Bumble Flower Beetle" (2011). All Current Publications. Paper 866.