McAlpine: Australian Helosciomyzidae 
65 
Figures 19-26. (19) Helosciomyza steyskali, protandrogram. (20) H. australica, epandrium and associated structures, posterior view, semi 
diagrammatic, setulae omitted. (21) H. neboissi (Pelion), left surstylus, outer view, scale = 0.2 mm. (22). H. australica (Picton Lakes), 
left surstylus, outer view. (23). H. steyskali (Boyd River), left surstylus, outer view. (24). H. obliqua (Mount Donna Buang), left surstylus, 
outer view. (25). H. driesseni (holotype), left surstylus, outer view. (26). H. macalpinei (holotype), left surstylus, outer view. Figs 21-26 
all to same scale, c, cercus; ep, epandrium; pbf, posterobasal foot of surstylus; ss, surstylus; s5-s8, sternites 5 to 8; t5, t6, tergites 5 and 6. 
