African Dacus (Diptera: Tephritidae); New Species and Data, with Particular Reference to the Tel Aviv University Collection Author White, Ian M. Author Goodger, Kim F. M. text Zootaxa 2009 2127 1 49 journal article 10.5281/zenodo.274925 534e3106-2d37-4f90-98c7-fe3fab66dc7b 1175-5326 274925 Dacus ( Didacus ) insolitus sp.n. Figures 20 – 26 . Diagnosis. Differs from all other known African Dacus spp. in its lack of a facial spot (fig. 23), combined with an extensive covering of microtrichia in cell bc. Description. Size . Very small, wing length, 2.8 – 3.8 mm . Head (fig. 23). Pedicel+1st flagellomere not longer than ptilinal suture. Face, antennal furrow without a dark spot. Frons, frontal setae 1, orbital setae 0. Thorax (figs 20, 24). Scutum red-brown; postpronotal lobe and notopleural callus concolorous with scutum; notopleural xanthine absent; lateral and medial postsutural vittae absent. Scutellum concolorous with scutum. Anepisternum without a yellow stripe. Katepisternum with a trace of a xanthine. Laterotergal xanthine absent. Setae . Anterior notopleural seta absent; anterior supra-alar seta absent. Wing (fig. 26). Basal cells bc and c with an almost complete covering of microtrichia; cell bm without microtrichia. Narrow subbasal raised section of cell br with extensive covering of microtrichia. Crossvein R-M beyond middle of cell dm. Costal band pale (but distinct) in cell r1; reduced to a very narrow and pale band in cell r2+3 (barely discernable); apically expanded into a distinctly coloured oblique spot, reaching vein M. Anal streak present (colour extending beyond cell bcu). Cells bc and c hyaline. Crossbanding; at most with a trace of a crossband on the anterior portion of R-M. Legs (fig. 25). Femora brown. Abdomen (fig. 21). Predominantly red-brown, with distinct black pear-drop shaped spots on each of terga III, IV and V, but not coalesced into a strip. Tergites I – V all fused. Male . Tergite III with pecten, dense microtrichia adjacent end A1+Cu2, and hindtibia preapical pad. Female (fig. 22). Aculeus blunt and with preapical "shoulder"; complete torsion. Etymology. Named for its unusual ( insolitus ) combination of character states. Material. Holotype female ( NMKE ), KENYA : Nyanza, Nyamarandi Village, 1251m ., 0o30.535’S , 34 o11.206’E , 6 – 20.vi.2006 , malaise trap, R.S. Copeland. Paratypes : 1 female ( NMKE ), KENYA : Nyanza, Rusinga Island, 1206m ., 0o23.430’S , 34o10.995’E , 15. – 21.xi.2004 , malaise trap, R.S. Copeland; 1 female ( MRAC ), same data except, 28.xi. – 5.xii.2004 ; 1 male ( BMNH ), same data except, 29.xii.2004 – 4.i.2005 ; 1 female ( BMNH ), same data except, 21.iv. – 12.v.2005 . Remarks. The combination of aculeus torsion and lack of an anterior notopleural seta indicates an affinity to the Mulgens group; the abdomen pattern is similar to D . ( Lophodacus ) nairobensis but the dense covering of microtrichia in the narrowed portion of cell br rules out membership of sg. Lophodacus ; the complete lack of vittae (save for a trace on the katepisternum) is unusual in specimens that show no trace of postmortem staining; an almost complete coverage of microtrichia in cell bc is otherwise only known in four other African species, namely D . ( D .) bequaerti Collart, 1935 , D . ( Leptoxyda ) arabicus White, 2006 , D . ( Neodacus ) melanaspis ( Munro, 1984 ) and D . ( N .) xanthaspis ( Munro, 1984 ) .