Gymnochiromyia pretoriella Ebejer 2008, sp. n.

Gymnochiromyia pretoriella sp. n. Fig. 20 Etymology: Named after Pretoria, the South African city where it was found. Diagnosis: This is a small entirely yellow species with the hypopygium distinctly larger than is usual in the genus: it forms approximately 1/3 the volume of the whole abdomen, whereas in other species 1/5 to 1/4 is more typical. Otherwise, there are no external distinguishing features. Description: Male. Head: All yellow except for brownish oc triangle; fr narrower than half width of head, markedly narrowed anteriorly: at level of antennae 0.4 width that at level of anterior oc and 0.6 width of one eye viewed from front. Gena, more or less symmetrically rounded lower margin; in profile, below middle of eye, about equal to height of eye; yellow and pale haired. ocp in profile barely visible behind eye, with short postocular setulae in one irregular row; isolated lower post-genal seta long and golden yellow. Mouthparts small, all yellow; setulae on oral margin short. Face poorly sclerotised and depressed, barely visible.Antenna yellow, second segment paler than third with distinct short pale brown seta dorsally; third segment round, finely pubescent: hairs shorter than diameter of arista at base; arista brown almost throughout and completely bare. Chaetotaxy: 3 strong orbs, anterior inclinate and closer to middle orb than latter is to hind orb; pvt short, but distinct and crossed; 1 vti and 1 vte; oc about half length of hind orb, proclinate and lateroclinate; about 4 minute pale setulae across middle of fr, none on orb plate. Thorax: Entirely yellow including mtn. Chaetotaxy: 1 hu, 1 psthu, 2 ntpl, 1 short pra, 1 sa, 1 pa, 1 dc, acrs very short in 6–8 irregular rows, one prescutellar pair distinctly longer; 1 mspl, 1 stpl. Wing: Hyaline, veins all pale yellow, distance on costal margin between R 2+3 to R 4+5 is 0.8× that between R 4+5 and M 1+2; distance between crossveins about 0.5 length of apical section of Cu. Haltere yellow. Legs: Not modified except for very slightly thicker femora; fine setulae scattered on all pairs of legs, in addition to somewhat longer setae on fore femur. Abdomen: Entirely yellow, tg relatively short with numerous setae and setulae, longest about half as long as tg. Postabdomen: Hypopygium about as large as the preceding two visible abdominal segments together; ep large without markings, but with distinct seta at the ventrocaudal angle; surs short but distinct and slightly curved medially at apex; cerci very small and finely setulose; hyp distinctly broader basally in profile; ph apd short, narrow, broad only at base; ej apd very small and tubule visible; prg trapezoidal and setulose on margin; psg not identified, ph complex, subquadrate and asymmetrical. Female. Similar to male except for absence of secondary sexual characters; and setae more brownish. Length: ♂ 1.2 mm, wing 1.2 mm; ♀1.4 mm, wing 1.4 mm. Variation: None noted. Holotype: ♂ SOUTH AFRICA: Gauteng: Pretoria, Roodeplaat Dam N.R., 25 km NE Pretoria, 2.i.1995, A. Freidberg (TAU). Paratypes: SOUTH AFRICA: Gauteng: 1♀same data and depository as holotype; 2 ♂ Hartbeespoort, 25 km W Pretoria, 30.xii.1994, A. Freidberg (TAU).Published as part of Ebejer, M. J., 2008, New species of Gymnochiromyia Hendel, 1933 (Diptera: Schizophora: Chyromyidae) from Southern Africa, pp. 77 in African Invertebrates 49 (1) on pages 100-102, DOI: 10.5733/afin.049.0102, http://zenodo.org/record/764942