. Bulletin of the British Museum (Natural History) Entomology. 246 L. LYNEBORG on tergites 4-6 blackish. Dorsal areas of tergites with mixed blackish and whitish hairs. Sternites shining brownish black, with pile as on lateral areas of tergites. Distinct whitish hind-marginal seams on segments 2-5. Terminaha (Text-figs 159-165). Epandrium and gonocoxites reddish brown to brownish black, with black pile. Epandrium as in Text-figs 159, 163; with posterior margin modified, forming a large, balloon-shaped lobe dorsally and long, pointed hook ventrally. Gonocoxite (Text-fig. 159) much shorter than
. Bulletin of the British Museum (Natural History) Entomology. 246 L. LYNEBORG on tergites 4-6 blackish. Dorsal areas of tergites with mixed blackish and whitish hairs. Sternites shining brownish black, with pile as on lateral areas of tergites. Distinct whitish hind-marginal seams on segments 2-5. Terminaha (Text-figs 159-165). Epandrium and gonocoxites reddish brown to brownish black, with black pile. Epandrium as in Text-figs 159, 163; with posterior margin modified, forming a large, balloon-shaped lobe dorsally and long, pointed hook ventrally. Gonocoxite (Text-fig. 159) much shorter than epandrium, its posterior margin with a broadly rounded projection; dorsally with a short and broad distal end of dorsal gonocoxal process. Stylus in ventral view (Text-fig. 160) comparatively long and narrow, blunt-tipped. Ventral lobe comparatively long and broad. Phallus in lateral view (Text-fig. 161) rather thick and only slightly curved, in dorsal view (Text-fig. 162) only slightly narrowing towards tip. Dorsal apodeme in lateral view (Text-fig. 161) low and moderately curved, in dorsal view (Text-fig. 162) about twice as wide as base of phallus and with a constriction near distal end. Ventral apodeme short and very narrow, almost linear. Ejaculatory apodeme simple. Tergite 8: Text-fig. 164. Sternite 8: Text-fig. 165. Total length 7-6 mm. $. Unknown. Material examined. Holotype <$, Madagascar: Tarn., Perinet, {Fred Reiser) (NMB). Paratype. Madagascar: Tarn., Perinet, 1 $, (Fred Reiser) (ZMC). STENOSATHE gen. n. Gender: feminine. Type-species: Thereva brachycera Loew, 1857. Description. Head. Male eyes completely touching for a long distance on frons. Upper facets enlarged and clearly demarcated from the smaller facets. Female frons moderately broad, entirely tomentose with brownish and greyish colours, but not forming any distinct pattern. Frons in both sexes usually with distinct hairs. Face bare and with margins moderately diverging below. Facial ind
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