A key to the Mymaridae (Hymenoptera) egg parasitoids of proconiine sharpshooters (Hemiptera: Cicadellidae) in the Nearctic region, with description of two new species of Gonatocerus Author Triapitsyn, Serguei V. text Zootaxa 2006 1203 1 38 journal article 50803 10.5281/zenodo.172335 076b5447-7740-4af0-aef5-e34d9724424f 1175­5326 172335 Gonatocerus uat S. Triapitsyn, 2006 ( Figs 26, 27 ) Gonatocerus uat S. Triapitsyn in Triapitsyn et al. 2006: 58–62. Type locality Ciudad Valles, San Luis Potosí, Mexico . FIGURES 26–28. Gonatocerus spp. 26, 27. G. u at (female). 26. Pedicel and basal funicle segments. 27. Forewing. 28. Forewing of G. novifasciatus (female). Diagnosis Gonatocerus uat is very similar to G. ashmeadi , from which it can be distinguished by F1 of the female antenna usually having 2 (rarely 1) longitudinal sensilla ( Fig. 26 ) (always none in G. ashmeadi , Fig. 21 ) and also by the forewing blade being notably infuscated beyond venation, more conspicuously so behind the tip of the marginal vein ( Fig. 27 ) (at most with a faint, uniform brownish tinge in G. ashmeadi , Fig. 24 ). Triapitsyn et al. (2006) also provide molecular evidence of the clear separation between G. ashmeadi and G. u a t . Distribution Argentina , Mexico (Tamaulipas, San Luis Potosí), and Peru (Triapitsyn et al. 2006). In the Nearctic region, it is known only from Llera de Canales in Tamaulipas, Mexico , just north of the “border” between the Nearctic and Neotropical regions.