Strongylophthalmyia ustulata (Zetterstedt, 1847)

Zhou, Jiale, Evenhuis, Neal L. & Yang, Ding, 2024, Taxonomic review of the Strongylophthalmyia ustulata group (Diptera: Brachycera: Strongylophthalmyiidae) from China, with the descriptions of three new species, Zootaxa 5403 (5), pp. 530-548 : 532

Key to species of Strongylophthalmyia ustulata group from China

1 Mesonotum yellowish brown with blackish brown longitudinal band along midline ( Figs 9, 10 ); abdominal tergites mostly yellow with dark brown median patches ( Figs 9, 10 )..................................... S. flavimarginata sp. nov.

- Mesonotum entirely black ( Figs 1–4 , 15, 16 , 21 ); abdominal tergites mostly dark brown to black ( Figs 2–4 , 15, 16 , 21 ).... 2

2 Wing with indistinct dark suffusion at apex ( Fig. 33 )...................................... S. ustulata (Zetterstedt)

- Wing with distinct dark suffusion or patch at apex and median transverse band ( Figs 30, 32 ).......................... 3

3 Postpronotum and propleuron yellow ( Figs 1, 2 )........................................ S. bifasciata Yang & Wang

- Postpronotum and propleuron entirely black ( Figs 3, 4 , 15, 16 )................................................. 4

4 Antennal arista blackish brown ( Fig. 26 ); apical dark patch and median transverse band on wing much darker in cell r 2+3 than their remaining parts ( Fig. 30 ); fore femur yellow, lacking dark markings ( Figs 3, 4 )................. S. elongata sp. nov.

- Antennal arista yellowish brown with apical third blackish brown ( Fig. 28 ); apical dark patch and median transverse band on wing not darkened in cell r 2+3 than their remaining parts ( Fig. 32 ); fore femur yellow, with large blackish brown spot dorsal in apical third ( Figs 15, 16 ).................................................................. S. sivelli sp. nov.

Figures

FIGURE 21. Strongylophthalmyia ustulata (Zetterstedt, 1847), male, habitus, lateral. Scale bar 1 mm.

FIGURES 9–10. Strongylophthalmyia flavimarginata sp. nov., habitus, lateral: 9 male, holotype; 10 female, paratype. Scale bars 1 mm.

FIGURES 1–2. Strongylophthalmyia bifasciata Yang & Wang, 1992, habitus with labels, lateral: 1 male, holotype; 2 female, paratype. Scale bar 1 mm.

FIGURES 3–4. Strongylophthalmyia elongata sp. nov., habitus, lateral: 3 male, holotype; 4 female, paratype. Scale bars 1 mm.

FIGURES 15–16. Strongylophthalmyia sivelli sp. nov., habitus, lateral: 15 male, holotype; 16 female, paratype. Scale bars 1 mm.

FIGURES 30–33. Right wing of Strongylophthalmyia spp., dorsal: 30 S. elongata sp. nov.; 31 S. flavimarginata sp. nov.; 32 S. sivelli sp. nov.; 33 S. ustulata (Zetterstedt, 1847). Scale bars 1 mm.

FIGURES 26–29. Left antenna of Strongylophthalmyia spp., lateral: 26 S. elongata sp. nov.; 27 S. flavimarginata sp. nov.; 28 S. sivelli sp. nov.; 29 S. ustulata (Zetterstedt, 1847).