New species of the genus Gnathochorisis Förster (Hymenoptera: Ichneumonidae: Orthocentrinae) from the Neotropical Region Author Humala, Andrei E. text Zootaxa 2017 4250 3 201 218 journal article 33303 10.11646/zootaxa.4250.3.1 54070dc1-6bb8-41b6-85eb-11b80b22bb43 1175-5326 495011 2EA2F719-91F3-42A6-8DA5-506F4A582A1E Gnathochorisis khalaimi Humala , sp. nov. Figs 3 A, 4E, 5E, 6E. Description . Female ( holotype ). Body length 3.8 mm . Fore wing length 3.5 mm . Head 1.3 × as wide as high; face polished, at level of antennal fossae 0.45 × as wide as head ( Fig. 4 E). Clypeus weakly separated from face, edge of clypeus truncate, malar space 1.3 × as long as mandible basal width, with shallow microsculptured subocular sulcus; maxillary palp reaching slightly beyond fore coxa. In dorsal view, head concave posteriorly, occipital carina complete; temple distinct, 0.45 × as long as eye length, posterior ocellus separated from eye by 1.1 × ocellar diameter, posterior ocelli line 0.8 × ocellar diameter ( Fig. 5 E). Antenna approximately as long as fore wing, with 20 flagellomeres; basal flagellomere 6.7 × as long as wide; subapical flagellomeres approximately 1.5 × as long as wide. Mesosoma 1.3 × as long as high. Mesoscutum convex, matt with dense setae; epomia present; notauli indicated anteriorly; epicnemial carina complete; scutellum in profile somewhat high, with lateral carinae almost to apex; anterior transverse carina of propodeum strongly raised; area superomedia almost as long as wide, costula present; rounded apophyses of propodeum resulting from crossing lateral longitudinal and posterior transverse carinae well developed ( Fig. 6 E). Most of propodeum polished with scarce setae. Metapleuron polished. Fore wing with areolet closed, slightly longer than high, areolet comparatively small, petiolate, with 3rs-m longer than 2rs-m; vein cu-a inclivous, opposite Rs+M; hind wing with nervellus intercepted at about lower 0.25, Cu1 present. Hind legs stout, coxa and femur polished, tibia and tarsus coriaceous; hind femur inflated, spindle-like, 3.4 × as long as high, approximately as wide as hind coxa. Hind tibia 5.0 × as long as maximum width, tibia with spinelike setae; basitarsus 0.35 × as long as hind tibia. First metasomal segment slender, moderately arched, 2.3 × as long as apically wide, coriaceous; spiracles protruding and directed backwards ( Fig. 6 E). Dorsal longitudinal carinae well developed. Spiracle at 0.5, sternite at 0.6 of first tergite length. Second tergite 0.7 × as long as posteriorly wide, coriaceous, smooth apically, with small thyridium in basolateral corner. Third tergite with weak microsculpture, more conspicuous basally; remaining tergites of metasoma polished; metasoma flattened laterally from third tergite. Ovipositor slightly upcurved, about as long as first metasomal segment, with subapical dorsal notch sharply delimited. Fuscous. Head mostly yellowish-rufous except darkened occiput and blackish interocellar area; clypeus, mandibles, palps, tegulae, base of wings, fore and mid coxae and trochanters pale. Flagellum dark brown, slightly paler basally. Mesoscutum rufous with three fuscous blurred patches on lateral lobes and antero-medially; scutellum rufous; pronotum, propleuron, mesepimeron, lower mesopleuron, and mesosternum yellowish-rufous. Legs mostly light brown, hind femur slightly darkened apically, hind tibia basally and apically. Metasoma fuscous; second tergite in apical 0.2 and very base of tergite 3, thyridium and pair of small round lateral spots in apical half of second tergite light brown. Wings hyaline. Male . Unknown. Comparison. Similar to G. rufa sp. nov. in having strong apophyses on the propodeum, but differs from this species by the wider face, fuscous upper mesopleuron, propodeum and metapleuron, and spindle-like inflated hind femur. Material examined. Holotype female ( UNAM ), México , San Luis Potosí , N Xilitla , Las Pozas , 570 m , N 21°23.684' , W 98°59.566' , 19.XI.2011 , leg. A.I. Khalaim ; Paratypes : 1 female ( ZISP ), México , Veracruz , SW of Xalapa , park near Institute de Ecologia , 1260 m , N 19°30.768' , W 96°56.349' , 12–14.IV.2014 , leg. A.I. Khalaim ; 1 female ( BMNH ), México , Veracruz , Xalapa , USBI, T2 H5, 19°30ʹ N, 96°55ʹ W, 1279 m , Malaise trap , 8–18.VI.2015 , leg. M. López-Ortega; 1 female ( UAT ), México , Oaxaca , Municipio Comaltepec , La Esperanza , 1600 m , N 17.62601° , W 96.36950° , 2-12.VIII.2008 , MT, Bosque Lluvioso de Montaña. leg. A. López-Garcia . Distribution. Mexico ( Oaxaca , San Luis Potosí , Veracruz ) ( Fig. 1 ). Etymology . I am pleased to name this species after my colleague Dr Andrey I. Khalaim (ZISP, UAT).