Key to the species of Afrotropical Ectropina

1. Forewing with apical fascia reduced to a short strigula, more or less arched; median fascia not interrupted (see pl. 5, figs. 2-4 in Vári 1961)........................................................................................ 2

- Forewing with apical fascia long and thin, straight; median fascia interrupted in the middle (Fig. 5).. spirostachydis sp. nov.

2. Forewing unicoloured greyish-fuscous between the yellow fasciae (see pl. 5, fig. 3 in Vári 1961)................ citricula

- Forewing with ferruginous-brown fasciae between and beyond the yellow ones.................................... 3

3. Phallus sinuate; valva longer than broad (see pl. 54, fig. 2 in Vári 1961)................................ sclerochitoni

- Phallus strongly curved in the middle; valva shorter than broad (see pl. 54, fig. 1 in Vári 1961)................... ligata