A Revision of <i>Zaeucoila</i> Ashmead (Hymenoptera, Figitidae), Parasitoids of Agromyzidae (Diptera): New Species, Identity, Distribution, and Hosts

Abstract

The eucoiline genus <i>Zaeucoila</i> Ashmead is revised. Following a reevaluation combining previously published phylogenetic data and new specimens, <i>Agrostocynips</i> Díaz is synonymized with <i>Zaeucoila</i>. All species included in <i>Zaeucoila</i> are systematically treated, and now amounts to twelve, seven of which are described as new here: <i>Zaeucoila bitiburculata</i> new species, <i>Z. fidalgoii</i> new species, <i>Z. infuscata</i> new species, <i>Z. johnsonii</i> new species, <i>Z. lignys</i> new species, <i>Z. normae</i> new species, <i>Z. patera</i> new species. The following new combinations are proposed and species redescribed: <i>Zaeucoila grenadensis</i> (Ashmead), new combination; <i>Z. robusta</i> (Ashmead), new combination; <i>Z. flavipes</i> (Ashmead), new combination. <i>Agrostocynips diastrophi</i> (Ashmead), <i>Agrostocynips clavatus</i> Díaz, and <i>Agrostocynips enneatoma</i> (Díaz) are new synonyms of <i>Zaeucoila robusta</i>. <i>Zaeucoila incompleta</i> (Kieffer), Z. <i>triangulifera</i> Kieffer, and <i>Z. unicarinata</i> Ashmead are redescribed. <i>Zaeucoila</i> is an unusual genus of Zaeucoilini in its wide distribution area: it can be found from southern Argentina well into the eastern United States and southern Canada; no other zaeucoiline genus shows such a pattern. Host records and geographic data for <i>Zaeucoila</i> are brought up to date, as well as a key to species. <i>Zeucoila</i> are primary parasitoids of Agromyzidae, including <i>Liriomyza trifolii</i> and other species that are notable economic pests of agriculture. <i>Tropideucoila fulvonotata</i> (Kieffer) is transferred to <i>Marthiella</i> (new combination).