Geographical distribution, host plant range and prey species of Stethorus gilvifrons were studied in Khuzestan province during 1998-1999. Duration of different life stages and feeding rate of this species, using sugarcane mite (Oligonychus sacchari) as a prey, were also studied at two temperatures 26±1 and 36±1Co, 60±5% relative humidity and 16 hours of light under laboratory conditions. Only one species, Stethorus gilvifrons (Mulsant), was collected and identified from different crops and weeds of this region. Six species of spider mites (Tetranychus turkestani, Oligonychus sacchari, Oligonychus afrasiaticus, Eutetranychus orientalis, Eotetranychus hirsti and Eotetranychus pomi), were also collected as major preys of S. gilvifrons. Under laboratory conditions at 26±1 and 36±1 Co mean duration time took 14.6±0.48 and 10.57±0.19 days to develop from egg to adult respectively. At 26 Co, the longevity and feeding rate of female, reared on Oligonychus sacchari, were 59.8±5.9 (day) and 71.5±7.55 (adult mites per day), respectively, that were significantly higher than longevity (51.2±6.7) and feeding rate (52.2±5.52) of males.