Eugnoriste florea, 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 : 59

Eugnoriste florea sp. n.

( FIg. 4 A–F; plate II, FIg. III; plate III, FIg. VI)

Locus typicus: USA, ArIzona, PIma County, TucSon MountaInS , 16 km W TucSon, Sonora deSert, 32.24°N, 111.13°W.

Holotype: Male, 2.III.–7.Iv.1996, leg. Prchal (PWMP).

P aratypes: 9 maleS, 5 femaleS, 15.–30.vIII.1995; 3 maleS, 9.–30.vIII.1995; 3 maleS, 2 femaleS, 24.IX.–5.X.1995, Same localIty, leg. Prchal (9 maleS, 7 femaleS PWMP, 1 male In SDEI, 1 male PKHH, 1 male MZH).

Description. Male. Head. Elongate, hIgher than long. Eye brIdge 3 facetS wIde. 4th flagellomere wIth l/w IndeX of 1.8–2.0, wIth pale haIrS, Shorter than the dIameter. PalpuS 3-Segmented, longer than the proboScIS; the fIrSt Segment wIth 5–6 brIStleS and very Short haIr-lIke SenSIllae. Labrum and proboScIS elongate, aS long aS the head hIgh. Thorax. Dark brown; Scutum wIth Short haIrS, Some lateral and preScutellar brIStleS longer. Scutellum wIth 2 Stronger and 2 Shorter brIStleS. PoSterIor pronotum bare. WIngS brownISh; R1 = 3/4 R; c Shorter 1/2 w; y = X, bare; M-fork aS long aS M-Stem, narrow; CuA-Stem dIStInct, equal or Somewhat longer than X; poSterIor veInS dIStInct, wIthout macrotrIchIa. Haltere Short, brown. LegS brownISh; the tIbIal organ of the fore tIbIae wIth a patch of pale brIStleS, dIStInctly bordered; the mIddle and the hInd tIbIae wIth equal SpurS. ClawS wIthout teeth. Abdomen. The fIrSt SIX abdomInal tergIteS wIth SparSe and Short haIrS, the Seventh wIth a denSe cluSter of brIStleS at the mIddle of the dIStal border. The ventral baSe of the hypopygIum wIdely v-Shaped, the membranouS part bare; the Inner membranouS margIn of gonocoXIteS wIth Short haIrS. GonoStyluS taperIng towardS apeX, the Inner SIde weakly concaved, vIrtually StraIght; on the tIp wIth two Strong SpIneS wIthIn Shorter haIrS and a long whIplaSh haIr. The 9th SternIte IS bIlobated, wIth two long lobeS and long haIrS In the dIStal half. The tegmen IS wIder than long, apIcally rounded, wIth a dIStInct area of fIne teeth. The aedeaguS IS rather Short, wIth a large furca. Body length: 3.0 mm. Female. Head elongate, flat ovoId, twIce aS hIgh aS long. Eye brIdge 4 facetS wIde. 4th flagellomere wIth l/w IndeX of 1.4, wIth pale 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 Shortly haIred, Some lateral and preScutellar brIStleS longer. Scutellum wIth 2 Strong brIStleS. AbdomInal SegmentS haIred unIformly Short.

Comments. The SpecIeS IS characterIzed by a Slender gonoStyluS wIth a vIrtually flat Inner SIde, a bare membranouS part of the ventral baSe of the hypopygIum and long lobeS of the 9th SternIte, unIformly haIred In the dIStal half.

Distribution. USA (ArIzona).

Figures

FIGURE 4. Eugnoriste florea sp. n. Male. Holotype. A. Part of hypopygium, ventral vieW. B. Head and thoraX. C. 4 th flagellomere. D. Wing. E. ApeX of fore tibia. F. Abdominal tergite 6, dorsal vieW.