The twice-stabbed form of Olla has white markings on the side of the pronotum. C. cacti feeds predominantly on scale insects. Larvae of this species, which feed on aphids and mites, and secrete wax filaments on their bodies which make them look much like mealybugs. Fed female adult beetles lay yellow oval-shaped eggs in clusters or singly near infestations of aphids or other pests. Development from egg to adult takes 2 to 3 weeks.
Mouthparts are for chewing.
Larvae and adults feed primarily on aphids, but they will also feed on scales, eggs of caterpillars and other soft-bodied insects and mites. Adults disperse seeking feeding and reproduction sites. None, this is a beneficial insect. For additional information, contact your local Texas extension service agent, or search for other state extension service offices.