Metatrichia, Coquillett, 1900

Ale-Rocha, Rosaly & Limeira-De-Oliveira, Francisco, 2021, New species and new record of Neotropical Metatrichia Coquillett (Diptera: Scenopinidae), Zootaxa 5039 (1), pp. 119-128 : 127

Key to extant species of Metatrichia from the New World

1 Abdomen without scale-like setae ( Fig. 9 ).................................................................. 2

- Abdomen with scale-like setae ( Figs 4 , 10 )................................................................. 3

2 Legs dark brown to black with foretarsus brownish, and mid and hind tarsus yellow with apical tarsomeres brown; abdomen black ( Fig. 5 ).................................................................... M. brunneipennis sp. nov.

- Legs pale brown to yellow; abdomen generally bronzed with posterior margins of tergites 1–7 pale yellow ( Figs 5, 6 - Winterton & Woodley, 2009)...................................................... M. venezuelensis Winterton & Woodley

3 Abdomen dark brown to black with lateral margins yellow to reddish yellow in males (female unknown); legs wholly brown to black............................................................................................... 4

- Abdomen wholly black in males, sometimes apex lighter in females; legs with yellow parts ( Fig. 10 )................................................................................................... M. bulbosa (Osten Saken)

4 Abdomen black with lateral margins of tergites 3–6 and entire tergite 7 reddish yellow, with scale-like setae laterally; wings with brownish yellow infuscation. Larger species (7.0mm)...................................... M. robusta Krober

- Abdomen dark brown with distal margin and lateral of tergites 3–7 yellow, yellow portion of tergites increasing in width towards apex of abdomen and T7 with distal half yellow, with scale-like setae on lateral margin of T2 and T3 and over the entire T4–T7 ( Figs 1, 4 ); wing with cream-white infuscation ( Fig. 1 ). Small species (5.25mm).............. M. barbata sp. nov.

Figures

FIGURES 5–9. Metatrichia brunneipennis sp. nov.. Male: 5, habitus, lateral view; 6, female, head, anterior view; 7, male, head, anterior view; 8, female, scutum, dorsal view; 9, male, abdomen, dorsal view.

FIGURES 1–4. Metatrichia barbata sp. nov.. Male: 1, habitus, lateral view; 2, head, anterior view; 3, scutum, dorsal view; 4, habitus, dorsal view.

FIGURES 10–12. Metatrichia bulbosa (Osten Saken). Male: 10, habitus, lateral view; 11, head, anterior view; 12, scutum, dorsal view.