Key to African species of Sabeurina

1 Frons yellow with one third of its area occupied by the narrow straight-sided frontal triangle. At vertex, frons and occiput meet at right angle. Frontal triangle with almost straight margins and at mid-length about 1/3 width of frons. Scutum and scutellum on the same plane, the former black with notopleural area and two longitudinal lines yellow, these connecting with the yellow rim of the scutellum. Male terminalia (plate 7, Fig. 28)...................... minuta (Loew) (Southern & Eastern Africa)

- Frons infuscate, but dirty yellow on anterior margin, with quite two thirds of its area occupied by the convex-sided frontal triangle. At vertex, frons rounded into occiput. Frontal triangle with convex broders and at mid-length about 7/10 width of frons. Scutum only yellow on notopleural area. Scutellum yellow, faintly brownish at base and with its surface more convex than plane of scutum. Male terminalia (plate 7, Fig. 29)...................................... occidentalis sp. n. (Nigeria)