The Genus Orius of the Western Hemisphere (Hemiptera: Anthocoridae)

Record of two species of Orius Wolff (Hemiptera, Anthocoridae) in Brazil

“…The insects of this species collected in the United States of America and Europe usually have a milky white-colored membrane, according to Luciana Tavella (personal communication). Based on KELTON (1963) andHERRING (1966), since the adults of O. insidiosus can undergo variations in color in accordance with the habitat, this characteristic is not reliable for the determination of species, therefore it is necessary to appeal to the male genitalia for such. In O. insidiosus the cone and the flagellum are proportional in the size and in the width, and for female, copulatory tube is as long as wide (Figs.…”

“…Orius insidiosus (Say, 1832): 1, adult male; 2, male genitalia; 3, female copulatory tube. Orius thyestes Herring, 1966: 4, adult male; 5, male genitalia; 6, female copulatory tube.…”

“…The predators were stored in flasks containing 70% alcohol for preservation and identification based on patterns of the wings, body and male and female genitalia which, according to some authors, are the most reliable structures for taxonomic determination (KELTON 1963;HERRING 1966;PÉRICART 1972). The male abdomen was removed, macerated in 10% KOH, and boiled in a water bath for approximately 20 min.…”

“…Orius thyestes Herring, 1966 was found to be present in the localities of Lavras (MG) and Pindorama (SP), and it was collected from a fewer number of hosts, and particularly from invasive plants. HERRING (1966) registered the occurrence of O. thyestes only in Colombia and Mexico; O. thyestes in Brazil is reported here for the first time.…”

“…The genitalia of both sexes were studied and illustrated. Two species were identified, Orius insidiosus (Say, 1832) and Orius thyestes Herring, 1966. O. insidiosus, the most common species, was collected in all of the localities sampled [Lavras (MG), Holambra, Pindorama and Campinas (SP)].…”