Key to the species of Aristobatina Verbeke

1 Outer vertical seta absent (Fig. 19); notum brick-red in colour (Figs 18, 20) ........2

– Outer vertical seta present (Fig. 22); notum predominantly dark brown to black in colour.......................................................................................................................3

2 Mid femur dark in basal ⅔, orange distally (Fig. 20); male with ejaculatory apodeme extremely large, much larger than epandrium (Fig. 13) ........................................... ............................................................................ rufithorax (Enderlein) (Tanzania)

– Mid and hind femora brown, with 2 yellow rings; male with ejaculatory apodeme very small, much smaller than epandrium ................................................................ ...................................... principalis (Frey) (Malawi, Mozambique and Zimbabwe)

3 Wing with macula or fascia; fore femur predominantly orange; overall length 12–14mm; usually with small intrapostalar seta present (between postalar and presutural dorsocentral setae)..................................................................................4

– Wing uniformly infuscate; fore femur black (Fig. 27); overall length more than 15mm; without intrapostalar setae (between single postalar and dorsocentral setae) ........................................................................................ udzungwa sp. n. (Tanzania)

4 Wing with discal band reduced to a circular patch (Figs 2, 23); mid femur uniformly orange, except apically............................................................................................5

– Wing with extensive discal band, extending from R 1 to CuA 1 (Fig. 26); mid femur either predominantly black or banded in pale brown and orange. ............................ ......................................................................................... morogoro sp. n. (Tanzania)

5 First 2 tarsomeres of hind leg white (Fig. 21). Paired spermathecae short, with a striate surface (Fig. 16)................................................... melasma sp. n. (Tanzania)

– Second tarsomere and at least distal ⅓ of first tarsomere of hind leg dark (Fig. 2). Paired spermathecae elongate, with a smooth surface (Fig. 1). ................................ .................................................................................. metamelasma sp. n. (Tanzania)