Key to Athalia himantopus species group

1 Wings uniformly flavescent-hyaline or more or less infuscate throughout........................................ 2

- Wings more or less bicoloured, flavescent basally and infuscate apically......................................... 4

2 Wings infuscate throughout............................................................................ 3

- Wings uniformly flavescent-hyaline throughout.............................................. A. obsoleta Benson

3 Wings slightly infuscate; antennae of the male 1.3 × as long as maximum head width............... A. sidamoensis Koch

- Wings conspicuously infuscate; antennae of the female 1.6 × as long as maximum head width......... A. taitaensis Koch

4 Tergum 1 entirely yellow.............................................................................. 5

- Tergum 1 yellow with two small blackish medial spots................................. A. marginipennis Enderlein

5 Metepimeron entirely yellow............................................................. A. truncata Enslin

- Metepimeron black, with narrow yellow posterior margin..................................... A. flavobasalis Koch