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