New species of Gymnochiromyia Hendel, 1933 (Diptera: Schizophora: Chyromyidae) from Southern Africa Author Ebejer, M. J. text African Invertebrates 2008 2008-06-30 49 1 77 77 http://www.bioone.org/doi/abs/10.5733/afin.049.0102 journal article 10.5733/afin.049.0102 2305-2562 7649425 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. Figs 19, 20. Male hypopygia, lateral aspect: (19) G. nubilipennis sp. n. , scale bar = 0.25 mm; (20) G. pretoriella sp. n. , scale bar = 0.2 mm. 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 ). Figs 21, 22. G. punctata Ebejer : (21) male hypopygium, lateral view, scale bar = 0.25 mm; (22) female postabdomen, lateral view (a), st 8, ventral view (b), spermatheca (c), scale bar = 0.15 mm. Paratypes : SOUTH AFRICA : Gauteng : 1^same data and depository as holotype ; 2 _ Hartbeespoort , 25 km W Pretoria , 30.xii.1994 , A. Freidberg ( TAU ) .