Platypyginae

Greathead, D. J. & Evenhuis, N. L., 2001, Annotated keys to the genera of African Bombylioidea (Diptera: Bombyliidae; Mythicomyiidae), African Invertebrates 42 (1820), pp. 105-224 : 132

Key to genera of Platypyginae

1 Oral cavity with a prominent ventral sulcus, and produced posteriorly resulting in well developed postgena of either two lateral points or one single medial point ( Fig. 16 b ) .............................................................................................................. 2

– Oral cavity without a prominent ventral sulcus; postgena normal, or if produced posteriorly, a bulbous or blunt process ( Fig. 25 ), not pointed .............................. 4

2 Discal cell closed distally by crossvein ( Fig. 37 ); postgena developed into two lateral processes or posterior end of sulcus squared ( Fig. 16 b ) ........................... 3

– Discal cell open distally, not closed by crossvein ( Fig. 35 ); postgena developed into single point ............................................................... Cephalodromia Becker

3 Vein R1 short, ending in costa before level of r-m crossvein ( Fig. 37 ); vein Sc complete, ending in costa; first antennal flagellomere with basoventral and apicoventral bulges ( Fig. 12 ); crossvein r-m at middle of discal cell ( Fig. 37 ); spermathecae with long sclerotised apical duct leading to spherical reservoir ( Fig. 43 ) ............................................... Ahessea Greathead and Evenhuis , gen. n.

– Vein Sc incomplete, no ending in costa; first antennal flagellomere shaped as in Fig. 6 , without such bulges basally or apically; crossvein r-m at extreme base of discal cell ( Fig. 38 ); spermathecae with thin, membranous apical ducts leading to kidney-shaped reservoir ( Fig. 44 ) ............................................ Cyrtisiopsis Séguy

4 Discal cell closed distally by crossvein ..................................... Platypygus Loew

– Discal cell open distally, not closed by crossvein.......................... Cyrtosia Perris

Figures

Figs 16–17. Mythicomyiidae heads, diagrammatic. 16. Cephalodromia fusca (Séguy), a. lateral, b. ventral. 17. Mnemomyia rostrata Bowden. a. lateral. b. dorsal.

Figs 24–25. Mythicomyiidae, habitus drawings. 24. Leylaiya whiteheadi Greathead and Evenhuis sp. n. a. head and thorax, lateral view, wings removed.b. habitus, dorsal view, wings removed.25. Cyrtosia obscuripes Loew, head and thorax, lateral view, wings removed.

Figs 35–38. Mythicomyiidae wings. 35. Cyrtosia sp. (from Hull 1973). 36. Empidideicus turneri Hesse (from Hull 1973). 37. Ahessea crassirostris (Hesse). 38. Cyrtisiopsis singularis Séguy.

Figs 10–13. Mythicomyiidae antennae. 10. Doliopteryx tigrina Evenhuis. 11. Mnemomyia rostrata Bowden. 12. Ahessea crassirostris (Hesse). 13. Onchopelma pulchellum Hesse.

Figs 40–44.Mythicomyiidae, female spermathecae.40. Reissa roni Evenhuis and Báez sp.n. 41. Empidideicus freyi Greathead.42.Glella ashleyi Greathead and Evenhuis sp. n. 43.Ahessea crassirostris (Hesse). 44. Cyrtisiopsis melleus (Loew).

Figs 4–9. Mythicomyiidae antennae. 4. Glella ashleyi, Greathead and Evenhuis sp. n. 5. Empidideicus basutoensis Hesse.6. Cyrtisiopsis singularis Séguy. 7. Cephalodromia flava (Séguy). 8. Cyrtosia marginata Séguy. 9. Glabellula natalensis Hesse.