Triarthria setipennis is a species of tachinid fly which parasitizes other insects, including earwigs.Dimick, R.E. and Mote, D.C. (1934) Progress report regarding the introduction in Oregon of Digonocheata setipennis, a tachinid parasite of the European earwig. Journal of Economic Entomology 27, 863–865.Clausen, C.P. (1978) Dermaptera -- Forficulidae -- European Earwig. In: Clausen, C.P. (ed.) Introduced Parasites and Predators of Arthropod Pests and Weeds: A World Review, Handbook No. 480, United States Department of Agriculture, Washington, DC, pp. 15–18.
Distribution Albania, Andorra, Belarus, Austria, Belgium, Bulgaria, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Lithuania, Norway, Poland, Romania, Russia, Slovakia, Spain, Sweden, Switzerland, Netherlands, Ukraine, United Kingdom.
It has been introduced from Europe in the 1920s to control Forficula auricularia (European earwig) and it is established in British Columbia, Washington, Oregon, California, Idaho, Nevada, Utah, Newfoundland, New Hampshire, Massachusetts.
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