Eugnoriste hirsuta, Kauschke, 2017

Kauschke, Ellen, 2017, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part IV. Genera Eugnoriste Coquillett and Keilbachia Mohrig, Zootaxa 4319 (1), pp. 53-76 : 60-62

Eugnoriste hirsuta sp. n.

( FIg. 5 A–C; plate IV, FIg. VII)

Locus typicus: USA, ArIzona, CochISe County, Huachuca MountaInS , ASh Cyn Rd. , 31.39°N, 111.24°W.

Holotype: Male, 1.–11.XI.1993, oak-pIne woodland, MalaISe trap, leg. N. McFarland (PWMP).

Paratype: 1 female, 5.–30.vIII.1993, Same localIty, leg. N. McFarland (PWMP).

Description. Male. Head. Elongate, hIgher than long. Eye brIdge 4 facetS wIde. 4th flagellomere wIth l/w IndeX of 1.6, wIth brown haIrS, Shorter than the dIameter. PalpuS 3-Segmented, longer than the proboScIS; the fIrSt Segment wIth 6–7 brIStleS and very Short haIr-lIke SenSIllae. Labrum and proboScIS elongate, aS long aS the head hIgh. Thorax. Dark brown; Scutum Shortly haIred, Some lateral and preScutellar brIStleS longer. Scutellum wIth 2 Stronger and 2 Shorter brIStleS. PoSterIor pronotum bare. WIngS brownISh; R1 = 3/4 R; c = 1/2 w; y = X, bare; M-fork aS long aS M-Stem, narrow; CuA-Stem dIStInct, Somewhat longer X; poSterIor veInS dIStInct, wIthout macrotrIchIa. Haltere Short, brown. LegS brown; tIbIal organ of the fore tIbIae wIth a bordered patch of pale brIStleS. ClawS wIthout teeth. Abdomen. The fIrSt fIve abdomInal tergIteS wIth SparSe and Short haIrS, the SIXth wIth a SparSe and the Seventh wIth a denSe cluSter of brIStleS In the mIddle of theIr dIStal borderS. The ventral baSe of the hypopygIum IS wIdely opened and wIthout a lobe or denSer brIStleS. ItS Inner membranouS part haS denSe and Short haIrS. GonoStyluS thIck and wIdely rounded on the apeX, the Inner SIde IS weakly concaved; wIth two Strong SpIneS wIthIn Shorter haIrS and a long whIplaSh haIr. The 9th SternIte IS not vISIble In the holotype. The tegmen IS wIder than long, apIcally rounded and wIth a dIStInct area of fIne teeth. The aedeaguS IS rather Short, wIth a large furca. Body length: 3 mm.

Female. Head elongate, flat ovoId, twIce aS hIgh aS long. Eye brIdge 2–3 facetS wIde. 4th flagellomere wIth l/w IndeX of 1.4, wIth brownISh haIrS, Shorter than the dIameter. PalpuS 3-Segmented, longer than the proboScIS; labrum and proboScIS elongate, aS long aS the head hIgh. ThoraX brown, Scutum wIth Short haIrS, Some lateral and preScutellar brIStleS longer. Scutellum wIth 2 Stronger brIStleS. AbdomInal SegmentS wIth unIform Short haIrS. LegS brown. Body length: 3.6 mm.

Comments. MaleS of thIS dark SpecIeS are characterIzed by a cluSter of brIStleS on the dIStal margIn of the SIXth and the Seventh abdomInal tergIteS. The ventral baSe of the hypopygIum IS wIdely opened and wIth Short aS well aS denSe haIrS on the baSal membranouS part. The gonoStyluS IS large, apIcally rounded and weakly concave In the apIcal thIrd of the ventral SIde.

Distribution. USA (ArIzona).

Figures

FIGURE 5. Eugnoriste hirsuta sp. n. Male. Holotype. A. Part of hypopygium, ventral vieW. B. Head With basal flagellomeres. C. Abdominal tergites 5 – 8.