Key couplets to differentiate certain species of Homoneura

[Mesonotum with 1–3 pairs of long acr; frons mostly yellow with a pair of brown stripes extending to ocellar triangle]

1. Face with a pair of round blackish brown spots confluent medially on upper 1/2; parafacial with black inner margin; abdominal tergites 2–5 each with wide black posterior marginal band, about 1/2 length of each tergite (Figs. 51, 55)................................................................................................ H. (H.) stackelbergi Czerny

- Face entirely yellow; parafacial with yellow inner margin; abdomen entirely yellow or abdominal tergites 2–5 each with narrow black posterior margin, less than 1/3 length of each tergite (Figs. 57, 59)............... H. (H.) stackelbergiana Papp