Key to adult males of Manoa Fittkau

1. Frontal tubercles present; antepronotal and supraalar setae absent. Brazil........................... M. obscura Fittkau

- Frontal tubercles absent; antepronotal and supraalar setae present............................................... 2

2. Pars ventralis and digitus absent; pulvilli and pseudospurs present. North America, Dominican Republic ................................................................................................. M. pahayokeensis Jacobsen

- Pars ventralis and digitus present; pulvilli and pseudospurs absent...............................................3

3. Wing length 1.81–1.91 mm; AR 1.91–2.19; LR1 1.41; wing vein R1 bare; transverse sternapodeme with oral projections. Tan- zania....................................................................... M. tangae Andersen & Saether

- Wing length 1.43–1.50 mm; AR 1.13–1.33; LR1 0.96–0.98; wing vein R1 with 1–3 setae; transverse sternapodeme without oral projections. Oriental China...................................................... M. xianjuensis Qi & Lin sp. n.