Xestomyza lugubris Wiedemann, 1820

Hauser, Martin, 2012, A new species of Xestomyza Wiedemann, 1820 from South Africa, with a key to the genera of Xestomyzinae (Diptera: Therevidae), African Invertebrates 53 (1), pp. 175-175 : 179-180

Xestomyza lugubris Wiedemann, 1820

Figs 1–4 , 9, 11 , 18, 19

Xestomyza lugubris: Wiedemann 1820: 10 ; Lyneborg 1972: 357. Type locality: Cape of Good Hope; holotype in ZMUC.

Pseudoxestomyza longirostris Kröber, 1912: 12 ; Lyneborg 1972: 357. Type locality: Algoa Bay; holotype in NHMW.

Lyneborg (1972) gave a detailed redescription of this species, with illustrations of the male terminalia and head. One illustration he provides ( Lyneborg 1972: 356, fig. 187) supposedly illustrates a male head in lateral view, but it is clearly a female specimen and not identical with the male specimen in fig. 186. The setae on the frons and the dorsal part of the scape are much longer and erect in males, whereas they are short and virtually appressed in females ( Figs 9, 11 ).

Material examined: SOUTH AFRICA: Northern Cape: 1♀ 8 km E of Kamieskroon [30°10'52"S 18°00'20"E], [SE]3018AA, 5.ix.1983, Londt & Stuckenberg, montane old land with rocks & bushes nearby (MEI 116079, NMSA) . Western Cape: 1♂ Stellenbosch , #34, 33°57'S 18°54'E, 1494 m, 15.ix.1994, P.E. Reavell (MEI 164793, NMSA) ; 1♂ Paarl Dist. , Du Toits Kloof [33°45'S 19°11'E], 1000–2300 ft, 27–28.ix.1959, B. & P. Stuckenberg (MEI 116078, NMSA) ; 1♂ Stellenbosch [33°56'05"S 18°52'00"S], 2.ix.1926, Dr H. Brauns, “/ Pseudoxestomyza longirostris Kröb. Det Kröber 1927 / Therevidae Lyneborg specimen no. 1002/ Xestomyza lugubris det. Lyneborg 1970” ( NMSA) ; 1♂ Cape Peninsula, Silvermine Nature Reserve [34°06'27"S 18°26'08"E] nr road, 12.ix.2002, Barkemeyer (MEI 146480, WBC) .

Figures

Fig. 1. Xestomyza lugubris Wiedemann, male, habitus, lateral, overall length 11 mm.

Fig. 2. Xestomyza lugubris Wiedemann, female, habitus, lateral, overall length 9 mm.

Figs 3, 4. Xestomyza lugubris Wiedemann, habitus, dorsal: (3) male, overall length 11 mm; (4) female, overall length 9 mm.

Figs 9–12. Xestomyza spp., heads: (9) X. lugubris, ♀ holotype, lateral; (10) Xestomyza sp.A, ♀, lateral; (11) X. lugubris, ♂, dorsal; (12) X. stuckenbergi sp. n., ♀ paratype, dorsal. Not to scale.

Figs 13–19.Xestomyza spp., male terminalia:(13–15) Xestomyza stuckenbergisp.n., paratype:(13) ventral, (14) dorsal, (15) lateral; (16–19) aedeagus: (16) X. stuckenbergi sp. n., paratype, lateral; (17) same, ventral; (18) X. lugubris, lateral; (19) same, ventral. Abbreviations: ac – apical cap, da – dorsal apodeme, ea – ejaculatory apodeme, fe – finger­like extension, gc – gonocoxite, gs – gonostylus, h – hypandrium, lds – lateral distiphallus sclerite, va – ventral apodeme. Scale bar = 0.5 mm.