#4
Clephydroneura, numerous spp. from the Oriental region. Costa generally bulging outward is very distinctive. Joseph and Parui, 1979 (Ent. scand. 10: 33-42) noted that it is much similar to the Afrotropical genus
Synolcus. By the way, an unidentified South African robber fly shown in the wikipedia article (
https://en.wikipedia.org/wiki/Asilidae#/media/File:Closeup_Robber_Fly.jpg) most probably represents
Synolcus dubius (Macquart, 1846)