Diomus flavifrons(Blackburn), a coccinellid predator, was introduced from South Australia into Texas for the control of citrus mealybug on citrus. The beetle was successfully reared on citrus mealybug eggs with a developmental time of 28.7 days (24°C and 60% relative humidity). Egg incubation averaged 5.1 days; the four larval instars' developmental period averaged 5.1, 2.8, 2.2, and 7.7 days, respectively; and the pupae averaged 5.9 days for development. Adult longevity averaged 29.1 days for mated females and 77.6 days for virgin females when fed solely on eggs and 8.4 days when food was withheld. The fecundity of mated females averaged 146.9 eggs per female. AdultD. flavifronswere capable of surviving by feeding on mature mealybugs. Egg consumption averaged 815.4 eggs per adult over a 70-day period.