New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part IV. Genera Eugnoriste Coquillett and Keilbachia Mohrig Author Kauschke, Ellen text Zootaxa 2017 2017-11-11 4319 1 53 76 journal article 32139 10.11646/zootaxa.4319.1.3 4c53e97d-685a-445a-b6c9-c8db8c264d5d 1175-5326 888597 Bc01A8D7-6Bd7-4409-Bddc-E6Ebfd3C6E64 Keilbachia semiacuta sp. n. ( FIg. 11 A–C) Locus typicus : USA , Montana , GlacIer NatIonal Park, JackSon TrIal. Holotype : Male, vIII.1997 , leg. F. RöSchmann (PWMP). Description . Male. Head . Eye brIdge 3 facetS wIde; flagellomereS brown, Scape and pedIcel paler; 4th flagellomere long, wIth l/w-IndeX of 3.5, wIth haIrS aS long aS the dIameter, neck rather long. PalpuS 3-Segmented; the fIrSt Segment wIth one brIStle and a deepened SenSory pIt. Thorax . BrownISh, coXae and femora paler; Scutum wIth Short and fIne haIrS, a few lateral brIStleS are Stronger; Scutellum wIth two long brIStleS; poSterIor pronotum bare. WIngS pale; R1 = R; c = 2/3 w; y longer X; y wIth 1–2 macrotrIchIa; poSterIor wIng veInS obvIouS, wIthout macrotrIchIa. Haltere Short, knobS brownISh. LegS Somewhat paler than thoraX; tIbIal organ wIth a horSeShoe-lIke patch of brIStleS; SpurS of the mIddle and the hInd tIbIae longer than the apeX of tIbIa wIde; clawS wIthout teeth. Abdomen . HypopygIum wIthout an IntergonocoXal lobe or patch of brIStle; the ventral Inner margIn of gonocoXIteS wIth SparSe and Short haIrS; gonoStyluS concaved at the Inner SIde, wIth a Strong apIcal tooth and two hyalIne SpIneS, one above and the other below the tooth; In the mIddle of the Inner SIde wIth a very long, upwardS curved SpIne on a large, arm-lIke baSe. The tegmen IS longer than wIde, wIth a pyramId-lIke Inner Structure and a poorly SclerotIzed baSal part, wIth fIne teeth and a rather Short aedeaguS. Body length: 3.0 mm. Comments. The SpecIeS IS characterIzed by a Strong apIcal tooth on the gonoStyluS, accompanIed by two hyalIne SpIneS. ESpecIally StrIkIng IS a very long, upwardS curved SpIne located In the mIddle of gonoStyluS on a long, arm-lIke baSe. FlagellomereS are long wIth an l/w-IndeX of about 3.5. Distribution . USA ( Montana ). FIGURE 11 . Keilbachia semiacuta sp. n. Male. Holotype. A . Part of hypopygium, ventral vieW. B . PediCel and antennal flagellomeres 1–5. C . ApeX of fore tibia. PLATE I. Figure I Eugnoriste brachycostalis sp. n. (head); Figure II Eugnoriste brevirostris sp. n. (head). PLATE II . Figure III Eugnoriste florea sp. n. (head); Figure IV Eugnoriste ptilosis sp. n. (head). PLATE III . Figure V Eugnoriste brevirostris sp. n. (hypopygium); Figure VI Eugnoriste florea sp. n. (hypopygium). PLATE IV . Figure VII Eugnoriste hirsuta sp. n. (hypopygium); Figure VIII Eugnoriste ptilosis sp. n. (hypopygium). PLATE V . Figure IX Eugnoriste villosoabdominalis Mohrig, 2003 (head); Figure X Eugnoriste villosoabdominalis Mohrig, 2003 (adominal segments 5–6).