The flower bugs genus Orius Wolff, 1811 (Hemiptera: Anthocoridae) in Fars province is reviewd. These insects are useful and important as natural members of the predatory fauna and as biological control agents in many agroecosystems. The Orius specimens were collected from different regions of Fars province (southern Iran) during 2016-2019, and put in alcohol 75% mix of Glycerin 5%.  Then males' genitalia and females' copulatory tubes were mounted on slides by Hoyer’s medium to examine and illustrate the detailed characters. In this research Eight species are recognised, one of them Orius piceicollis (Linberg,1936)and subspecies Orius laevigatus maderensis (Reuter,1884)are new records for Iran. Diagnoses, habitus and DIC images of species including both male and female genitalia are provided. However identifying these insects has been based on identifying the male’s genitalia, but    upon the results of this investigation, female copulatory tubes, along with a male paramer characters can be used as a reliable character for identification of genus Orius species.