in N. America, widespread(1) but much more diverse in the south; C. pennsylvanicus and C. marginatus are widely eastern (both range into Canada), other spp. mostly in sw. US(2)(3)
Season
Summer into fall in temperate areas
Food
Larvae are predators. Adults of our spp. feed on pollen and nectar(1). Adults are also known to prey on other insects.
Life Cycle
They overwinter as larvae underground. There can be as many as 10 instars.
Remarks
Adults are frequently found on flowers and are probably good pollinators.