Published online by Cambridge University Press: 31 May 2012
Triarthria Stephens is known from two species in the New World. One is T. setipennis (Fallen), introduced into North America from Europe early this century as a biological control agent against its host, the European earwig (Forficula auricularia L.) (Dermaptera: Forficulidae). The second species is T. parva (Townsend), a widely distributed earwig (Doru spp.) parasitoid in the Neotropical region. Triarthria parva was originally described in the monotypic genus Parkerella Townsend; Parkerella is newly synonymized with Triarthria (syn.nov.), and T. parva is a new combination (comb.nov.). The genus Triarthria is diagnosed and the four included species are keyed: T. legeri (Villeneuve) (western Palearctic region), T. tienshanensis Ziegler (Uzbekistan), T. setipennis, and T. parva. The two species in the New World are diagnosed, illustrated, and their known distributions mapped.
Il existe deux espèces connues du genre Triarthria Stephens au Nouveau Monde. Triarthria setipennis (Fallen) a été introduite d’Europe en Amérique du Nord au début du siècle pour assurer la lutte biologique contre son hôte, le Perce-oreille européen (Forficularia auricularia L.) (Dermaptera : Forficulidae). La seconde espèce, T. parva. (Townsend), est un parasitoïde très répandu des perce-oreilles (Doru spp.) de la région néotropicale. Triarthria parva a d’abord été assigné au genre monotypique Parkerella Townsend; Parkerella est synonymisé à Triarthria et T. parva représente une nouvelle combinaison. On trouvera ici la diagnose du genre Triarthria et une clé des quatre espèces qui le composent : T. legeri (Villeneuve) (ouest de la région paléarctique), T. tienshanensis Ziegler (Uzbekistan), T. setipennis et T. parva. Les deux espèces du Nouveau Monde sont décrites, illustrées et leurs répartitions respectives sont cartographiées.
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