Key to the Afrotropical species of Thevenetimyia Bigot

1. Body length just over 6 mm (Fig. 2); terminal antennal segment with blunt apex (Fig. 3); thorax and dorsal area of occiput without golden or brown setae; scutellum with abundant spine-like tubercles (Fig. 4A and 4 B); medial crossvein curving gradually to meet posterior intercalary vein at an acute angle; M1 vein about six times the length of anterior intercalary vein (Fig 5).................................................................... T. spinosavus Maass & Bertone, sp. nov.

- Body length 9 mm; terminal antennal segment with moderately acute apex; thorax and dorsal area of occiput with at least some golden or brown setae; scutellum without abundant spine-like tubercles; medial crossvein abruptly curved to meet posterior intercalary vein at a right angle; M1 vein four times the length of anterior intercalary vein..... T. quedenfeldti (Engel, 1885)