Bumble flower beetles are oval in shape and range in size from 12-15 mm in length. Yellowish-brown to a dark reddish brown in color, dark spots pattern their bodies which are also covered with yellowish-brown hairs. It is common to hear an audible buzzing sound from adults in flight. Most commonly found in eastern Colorado, overwintering is done in the adult stage by burrowing into the soil. Adults emerge in the spring, after mating females seek moist organic matter in which to lay her eggs. Upon hatching, the C-shaped grubs begin feeding almost exclusively on the organic materials around them. Once full grown, the larvae create chambers in the earth in which they will pupate. Newly emerging adults appear a few weeks later and can be seen from mid-summer until fall. Only a single generation is produced each year.