Afropeza, a new South African genus (Diptera: Empidoidea: Brachystomatidae), with description of three new species Author Sinclair, Bradley J. Author Shamshev, Igor V. text African Invertebrates 2012 2012-06-30 53 1 239 239 http://www.bioone.org/doi/abs/10.5733/afin.053.0116 journal article 10.5733/afin.053.0116 2305-2562 7917164 Afropeza silvatica sp. n. Figs 2, 3 , 7–9 Etymology: From Latin silvaticus , -a , -um (of woods), in reference to Gudu Forest, where the species was primarily collected. Diagnosis: This species is characterised by the length of the postpedicel being 0.6× width of eye; pleura mostly lacking pruinescence; male terminalia symmetrical, held upright with pair of surstylar lobes and anterodorsal epandrial lobe bearing pair of setae. Description: Male . Head : Antenna ( Fig. 2 ) with postpedicel ca 0.6× width of eye; stylus comprising only spine-like apical mechanoreceptor. Figs 7–9. Afropeza silvatica sp. n. , terminalia: (7) male, lateral view; (8) male, anterior view; (9) female, lateral view. Abbreviations: apod – apodeme, cerc – cercus, ej apod – ejaculatory apodeme, epand lb – epandrial lobe, epand – epandrium, goncx apod – gonocoxal apodeme, hypd – hypandrium, pgt – postgonite, ph – phallus, spmth – spermatheca, st – sternite, sur – surstylus, tg – tergite. Scale bars = 0.1 mm. Thorax : Scutum mostly shiny, except thin clothing of pruinescence on postalar callus and scutellum; anterior margin of scutum shiny, lacking pruinescence; pleura mostly lacking pruinescence. Acrostichal setae on prescutellar depression biserial, erect and anteriorly directed. Legs : Mostly pale yellow, except base of fore coxa darkened; tarsi gradually darkening towards apex. Wing : Length 2–2.5 mm . Haltere knob and distal half of stem dark, proximal half of stem pale yellow. Abdomen : Setae mostly dark, except for anterior sternites; tergite 8 very narrow, except slightly expanded at lateral margin, symmetrical, lacking setation; sternite symmetrical. Male terminalia ( Figs 7–9 ): Symmetrical, held erect at apex of abdomen. Cercus heavily sclerotised, cone-shaped, with numerous long setae along anterior margin. Epandrium rounded, with oblique row of stout setae; epandrial lobe on anterodorsal margin with pair of stout setae of different lengths, longer seta projecting beyond posterior surstylar lobe. 6XUVW\OXV FRPSULVLQJ SDLU RI OREHV; DQWHULRU OREH ÀDWWHQHG, VOLJKWO\ FXUYHG SRVWHULRUO\, ZLWK RU 4 ¿QH VHWDH RQ LQQHU VXUIDFH; SRVWHULRU OREH H[SDQGHG DSLFDOO\, ZLWK QDUURZ, WDSHUHG REOLTXHO\ SURMHFWLQJ ¿QJHU‒OLNH SURFHVV. +\SDQGULXP QDUURZ, DUFKHG, ZLWK apex produced into pair of divergent projections, with gonocoxal apodeme shorter than ejaculatory apodeme, parallel-sided. Postgonite closely approximated with phallus; apex terminating into pair of sickle-shaped prolongations. Phallus arched and projecting posteriorly with tube-like opening between forked apex of hypandrium; ejaculatory apodeme enlarged ventrally and prolonged in horizontal plane, approximately twice length of gonocoxal apodeme. Female . Similar to male, except abdominal setae paler, especially toward posterior segments. +RORW\SH: ƃ ³6.$)5:.=1:5R\DO 1DWDO / 1DW.5HV., *XGX)RUHVW / Íϭ8θ±Í7 θ P; 07 / ƻ8°4θ.9θ¶6 ƻ8°ƽƽ.78¶( / 13.xii.2005 – 28.i.2006 / M. Mostovski leg.” (NMSA). Paratypes : SOUTH AFRICA : KwaZulu-Natal : ÍÍƃ ƻÍƂ VDPH GDWD DV KRORW\SH (Íθƃ ƻθƂ 106$, Íƃ ÍƂ &1&); 4ƃ VDPH DV KRORW\SH, H[FHSW Í8.[L.ƻθθ 6 ±ƻ7.LL.ƻθθ7 (106$); ƻƂ VDPH DV KRORW\SH, H[FHSW 29.i–28.v.2006 ( NMSA ).