The tarnished plant bug, Lygus lineolaris (P. de B.), is the dominant mirid in crops grown in eastern North America (Strong 1968; Bariola 1969). Lygus lineolaris is an ubiquitous species found on a wide range of wild plants and cultivated crops (Knight 1941).
All previously known egg parasitoids of Lygus spp. were mymarids in the genera Anaphes, Erythmelus, and Polynema (CIBC 1979). The mymarid Anaphes iole Girault is the principal egg parasitoid of Lygus spp. in the United States (Debolt 1987). It has been reported from British Columbia, Alberta, Ontario, Quebec, and the Northwest Territories(Huber and Rajakulendran 1988).