Homalocnemis, Philippi, 1865

Rafael, José A., Marques, Dayse W. A., González, Christian R. & Sinclair, Bradley J., 2022, Review of Homalocnemidae of Chile with a key to species and descriptions of male and female terminalia (Diptera: Empidoidea), Zootaxa 5222 (2), pp. 168-178 : 171

Key to Chilean species of Homalocnemis

1 Front of scutum with paired, broad brownish vittae between dull grey patches. Prescutellar depression with long, anteriorly pointed pruinescent stripe ( Fig. 4 ). Anal lobe of wing well developed ( Fig. 5 ). Vein R 2+3 strongly upcurved distally, ending proximal to branching of vein R 4+5 (radial fork). Section between veins R 2+3 and R 4 equal to or longer than section between veins R 4 and R 5 ( Fig. 5 ).................................................................. H. nigripennis Philippi

- Front of scutum entirely dull black. Prescutellar depression with broad rectangular pruinescent patch. Anal lobe of wing weakly developed ( Fig. 15 ). Vein R 2+3 gently upcurved distally, ending distal to branching of vein R 4+5 (radial fork). Section between veins R 2+3 and R 4 shorter than section between veins R 4 and R 5 ( Fig. 15 )........................ H. praesumpta Collin

Figures

FIGURES 1–5. Homalocnemis nigripennis. 1, male, habitus, lateral view; 2, female, habitus, lateral view; 3, male legs, anterolateral view; 4, female thorax and base of abdomen, posterodorsal view; 5, female wing.Abbreviations: bm – basal medial cell, br – basal radial cell, cua – anterior cubital cell, CuA+CuP – anterior branch of cubital vein + posterior branch of cubital vein, M – medial vein, R – radial vein, Sc – subcostal vein.

FIGURES 13–15. Homalocnemis praesumpta, male. 13, habitus, lateral view; 14, head, anterolateral view; 15, wing. Abbreviation: R – radial vein.